3994977358125 has 200 divisors, whose sum is σ = 8503450218648. Its totient is φ = 1851061248000.

The previous prime is 3994977358103. The next prime is 3994977358139. The reversal of 3994977358125 is 5218537794993.

3994977358125 is a `hidden beast` number, since 3 + 9 + 9 + 497 + 7 + 3 + 5 + 8 + 125 = 666.

It can be written as a sum of positive squares in 20 ways, for example, as 3603569466249 + 391407891876 = 1898307^2 + 625626^2 .

It is not a de Polignac number, because 3994977358125 - 2¹⁴ = 3994977341741 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 199 ways as a sum of consecutive naturals, for example, 11009589 + ... + 11366661.

Almost surely, 2^{3994977358125} is an apocalyptic number.

It is an amenable number.

3994977358125 is an abundant number, since it is smaller than the sum of its proper divisors (4508472860523).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3994977358125 is a wasteful number, since it uses less digits than its factorization.

3994977358125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357135 (or 357111 counting only the distinct ones).

The product of its digits is 514382400, while the sum is 72.

The spelling of 3994977358125 in words is "three trillion, nine hundred ninety-four billion, nine hundred seventy-seven million, three hundred fifty-eight thousand, one hundred twenty-five".