15252762640 has 40 divisors (see below), whose sum is σ = 35546986008. Its totient is φ = 6086599680.

The previous prime is 15252762617. The next prime is 15252762643. The reversal of 15252762640 is 4626725251.

It can be written as a sum of positive squares in 4 ways, for example, as 1050797056 + 14201965584 = 32416^2 + 119172^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 15252762593 and 15252762602.

It is not an unprimeable number, because it can be changed into a prime (15252762643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192757 + ... + 260116.

Almost surely, 2^15252762640 is an apocalyptic number.

15252762640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15252762640 is an abundant number, since it is smaller than the sum of its proper divisors (20294223368).

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

15252762640 is a wasteful number, since it uses less digits than its factorization.

15252762640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453307 (or 453301 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 40.

The spelling of 15252762640 in words is "fifteen billion, two hundred fifty-two million, seven hundred sixty-two thousand, six hundred forty".