39900557889 has 6 divisors (see below), whose sum is σ = 57634139186. Its totient is φ = 26600371920.

The previous prime is 39900557881. The next prime is 39900557923. The reversal of 39900557889 is 98875500993.

It can be written as a sum of positive squares in only one way, i.e., 25972545600 + 13928012289 = 161160^2 + 118017^2 .

It is not a de Polignac number, because 39900557889 - 2³ = 39900557881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39900557881) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2216697652 + ... + 2216697669.

Almost surely, 2^39900557889 is an apocalyptic number.

It is an amenable number.

39900557889 is a deficient number, since it is larger than the sum of its proper divisors (17733581297).

39900557889 is a wasteful number, since it uses less digits than its factorization.

39900557889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4433395327 (or 4433395324 counting only the distinct ones).

The product of its (nonzero) digits is 24494400, while the sum is 63.

The spelling of 39900557889 in words is "thirty-nine billion, nine hundred million, five hundred fifty-seven thousand, eight hundred eighty-nine".