3975420556863 has 24 divisors (see below), whose sum is σ = 6596958191616. Its totient is φ = 2259775328400.

The previous prime is 3975420556843. The next prime is 3975420556907. The reversal of 3975420556863 is 3686550245793.

It is a happy number.

3975420556863 is a `hidden beast` number, since 3 + 9 + 7 + 5 + 4 + 2 + 0 + 5 + 568 + 63 = 666.

It is not a de Polignac number, because 3975420556863 - 2⁸ = 3975420556607 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 3975420556863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3975420556843) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165176223 + ... + 165200288.

It is an arithmetic number, because the mean of its divisors is an integer number (274873257984).

Almost surely, 2^{3975420556863} is an apocalyptic number.

3975420556863 is a deficient number, since it is larger than the sum of its proper divisors (2621537634753).

3975420556863 is a wasteful number, since it uses less digits than its factorization.

3975420556863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330376715 (or 330376712 counting only the distinct ones).

The product of its (nonzero) digits is 163296000, while the sum is 63.

The spelling of 3975420556863 in words is "three trillion, nine hundred seventy-five billion, four hundred twenty million, five hundred fifty-six thousand, eight hundred sixty-three".