39699417520 has 40 divisors (see below), whose sum is σ = 105487025184. Its totient is φ = 13611228672.

The previous prime is 39699417517. The next prime is 39699417529. The reversal of 39699417520 is 2571499693.

It is a happy number.

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

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (39699417529) 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, 35445349 + ... + 35446468.

Almost surely, 2^39699417520 is an apocalyptic number.

It is an amenable number.

39699417520 is an abundant number, since it is smaller than the sum of its proper divisors (65787607664).

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

39699417520 is a wasteful number, since it uses less digits than its factorization.

39699417520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70891837 (or 70891831 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 55.

The spelling of 39699417520 in words is "thirty-nine billion, six hundred ninety-nine million, four hundred seventeen thousand, five hundred twenty".