6502748640 has 96 divisors (see below), whose sum is σ = 20561942016. Its totient is φ = 1727439360.

The previous prime is 6502748621. The next prime is 6502748641. The reversal of 6502748640 is 468472056.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6502748592 and 6502748601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6502748641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100485 + ... + 151995.

It is an arithmetic number, because the mean of its divisors is an integer number (214186896).

Almost surely, 2^6502748640 is an apocalyptic number.

6502748640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6502748640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10280971008).

6502748640 is an abundant number, since it is smaller than the sum of its proper divisors (14059193376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6502748640 is a wasteful number, since it uses less digits than its factorization.

6502748640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51792 (or 51784 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The square root of 6502748640 is about 80639.6220229237. The cubic root of 6502748640 is about 1866.5186010674.

The spelling of 6502748640 in words is "six billion, five hundred two million, seven hundred forty-eight thousand, six hundred forty".