9725921502 has 32 divisors (see below), whose sum is σ = 21226320000. Its totient is φ = 2946397920.

The previous prime is 9725921483. The next prime is 9725921531. The reversal of 9725921502 is 2051295279.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231624 + ... + 270372.

It is an arithmetic number, because the mean of its divisors is an integer number (663322500).

Almost surely, 2^9725921502 is an apocalyptic number.

9725921502 is an abundant number, since it is smaller than the sum of its proper divisors (11500398498).

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

9725921502 is a wasteful number, since it uses less digits than its factorization.

9725921502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42568.

The product of its (nonzero) digits is 113400, while the sum is 42.

The square root of 9725921502 is about 98620.0867065123. The cubic root of 9725921502 is about 2134.5692723069.

The spelling of 9725921502 in words is "nine billion, seven hundred twenty-five million, nine hundred twenty-one thousand, five hundred two".