39629997897 has 64 divisors (see below), whose sum is σ = 64487424000. Its totient is φ = 21144172608.

The previous prime is 39629997893. The next prime is 39629997907. The reversal of 39629997897 is 79879992693.

It is not a de Polignac number, because 39629997897 - 2² = 39629997893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39629997893) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 30984504 + ... + 30985782.

It is an arithmetic number, because the mean of its divisors is an integer number (1007616000).

Almost surely, 2^39629997897 is an apocalyptic number.

It is an amenable number.

39629997897 is a deficient number, since it is larger than the sum of its proper divisors (24857426103).

39629997897 is a wasteful number, since it uses less digits than its factorization.

39629997897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2370.

The product of its digits is 833299488, while the sum is 78.

The spelling of 39629997897 in words is "thirty-nine billion, six hundred twenty-nine million, nine hundred ninety-seven thousand, eight hundred ninety-seven".