39725856690 has 32 divisors (see below), whose sum is σ = 102676061376. Its totient is φ = 9778672320.

The previous prime is 39725856631. The next prime is 39725856691. The reversal of 39725856690 is 9665852793.

It is a super-2 number, since 2×39725856690² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39725856691) 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, 50930196 + ... + 50930975.

It is an arithmetic number, because the mean of its divisors is an integer number (3208626918).

Almost surely, 2^39725856690 is an apocalyptic number.

39725856690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

39725856690 is an abundant number, since it is smaller than the sum of its proper divisors (62950204686).

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

39725856690 is a wasteful number, since it uses less digits than its factorization.

39725856690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101861194.

The product of its (nonzero) digits is 24494400, while the sum is 60.

The spelling of 39725856690 in words is "thirty-nine billion, seven hundred twenty-five million, eight hundred fifty-six thousand, six hundred ninety".