3904778072475 has 72 divisors (see below), whose sum is σ = 8006873316000. Its totient is φ = 1781947330560.

The previous prime is 3904778072471. The next prime is 3904778072477. The reversal of 3904778072475 is 5742708774093.

3904778072475 is a `hidden beast` number, since 3 + 90 + 4 + 7 + 7 + 8 + 0 + 72 + 475 = 666.

It is not a de Polignac number, because 3904778072475 - 2² = 3904778072471 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (3904778072471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1239600 + ... + 3057149.

Almost surely, 2^{3904778072475} is an apocalyptic number.

3904778072475 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3904778072475 is an abundant number, since it is smaller than the sum of its proper divisors (4102095243525).

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

3904778072475 is a wasteful number, since it uses less digits than its factorization.

3904778072475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4297349 (or 4297341 counting only the distinct ones).

The product of its (nonzero) digits is 82978560, while the sum is 63.

The spelling of 3904778072475 in words is "three trillion, nine hundred four billion, seven hundred seventy-eight million, seventy-two thousand, four hundred seventy-five".