3975645078 has 20 divisors (see below), whose sum is σ = 8908390260. Its totient is φ = 1325214972.

The previous prime is 3975645029. The next prime is 3975645097. The reversal of 3975645078 is 8705465793.

3975645078 is a `hidden beast` number, since 3 + 9 + 7 + 564 + 5 + 0 + 78 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 12270348 + ... + 12270671.

It is an arithmetic number, because the mean of its divisors is an integer number (445419513).

Almost surely, 2^3975645078 is an apocalyptic number.

3975645078 is an abundant number, since it is smaller than the sum of its proper divisors (4932745182).

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

3975645078 is a wasteful number, since it uses less digits than its factorization.

3975645078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24541033 (or 24541024 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 54.

The square root of 3975645078 is about 63052.7166583645. The cubic root of 3975645078 is about 1584.1727385654.

The spelling of 3975645078 in words is "three billion, nine hundred seventy-five million, six hundred forty-five thousand, seventy-eight".