6515748408 has 64 divisors (see below), whose sum is σ = 17723331360. Its totient is φ = 1984167936.

The previous prime is 6515748383. The next prime is 6515748409. The reversal of 6515748408 is 8048475156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6515748409) 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, 77385 + ... + 137912.

Almost surely, 2^6515748408 is an apocalyptic number.

It is an amenable number.

6515748408 is an abundant number, since it is smaller than the sum of its proper divisors (11207582952).

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

6515748408 is a wasteful number, since it uses less digits than its factorization.

6515748408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215416 (or 215412 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 48.

The square root of 6515748408 is about 80720.1858768920. The cubic root of 6515748408 is about 1867.7615707191.

It can be divided in two parts, 6515748 and 408, that added together give a palindrome (6516156).

The spelling of 6515748408 in words is "six billion, five hundred fifteen million, seven hundred forty-eight thousand, four hundred eight".