39259855881 has 9 divisors (see below), whose sum is σ = 56709539341. Its totient is φ = 26172840972.

The previous prime is 39259855849. The next prime is 39259855897. The reversal of 39259855881 is 18855895293.

The square root of 39259855881 is 198141.

It is a perfect power (a square), and thus also a powerful number.

39259855881 is a `hidden beast` number, since 39 + 2 + 598 + 5 + 5 + 8 + 8 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 39259855881 - 2⁵ = 39259855849 is a prime.

It is a super-2 number, since 2×39259855881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39259855381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 561400 + ... + 627446.

Almost surely, 2^39259855881 is an apocalyptic number.

39259855881 is the 198141-st square number.

39259855881 is the 99071-st centered octagonal number.

It is an amenable number.

39259855881 is a deficient number, since it is larger than the sum of its proper divisors (17449683460).

39259855881 is an frugal number, since it uses more digits than its factorization.

39259855881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132100 (or 66050 counting only the distinct ones).

The product of its digits is 31104000, while the sum is 63.

The spelling of 39259855881 in words is "thirty-nine billion, two hundred fifty-nine million, eight hundred fifty-five thousand, eight hundred eighty-one".