3981925555 has 16 divisors (see below), whose sum is σ = 5060931840. Its totient is φ = 2997240832.

The previous prime is 3981925547. The next prime is 3981925567. The reversal of 3981925555 is 5555291893.

It is a cyclic number.

It is not a de Polignac number, because 3981925555 - 2³ = 3981925547 is a prime.

It is a super-2 number, since 2×3981925555² = 31711462251124116050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 427791 + ... + 436999.

It is an arithmetic number, because the mean of its divisors is an integer number (316308240).

Almost surely, 2^3981925555 is an apocalyptic number.

3981925555 is a deficient number, since it is larger than the sum of its proper divisors (1079006285).

3981925555 is a wasteful number, since it uses less digits than its factorization.

3981925555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14318.

The product of its digits is 2430000, while the sum is 52.

The square root of 3981925555 is about 63102.5003862763. The cubic root of 3981925555 is about 1585.0064922263.

The spelling of 3981925555 in words is "three billion, nine hundred eighty-one million, nine hundred twenty-five thousand, five hundred fifty-five".