39469720257 has 20 divisors (see below), whose sum is σ = 64321027056. Its totient is φ = 23921042040.

The previous prime is 39469720237. The next prime is 39469720261. The reversal of 39469720257 is 75202796493.

It is not a de Polignac number, because 39469720257 - 2¹¹ = 39469718209 is a prime.

It is a super-2 number, since 2×39469720257² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39469720237) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 22148223 + ... + 22150004.

Almost surely, 2^39469720257 is an apocalyptic number.

It is an amenable number.

39469720257 is a deficient number, since it is larger than the sum of its proper divisors (24851306799).

39469720257 is a wasteful number, since it uses less digits than its factorization.

39469720257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44298250 (or 44298241 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 54.

The spelling of 39469720257 in words is "thirty-nine billion, four hundred sixty-nine million, seven hundred twenty thousand, two hundred fifty-seven".