3978660536901 has 32 divisors (see below), whose sum is σ = 5904039840000. Its totient is φ = 2648066287104.

The previous prime is 3978660536791. The next prime is 3978660536923. The reversal of 3978660536901 is 1096350668793.

3978660536901 is a `hidden beast` number, since 3 + 9 + 7 + 8 + 6 + 6 + 0 + 536 + 90 + 1 = 666.

It is not a de Polignac number, because 3978660536901 - 2¹⁰ = 3978660535877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3978660536101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41988625 + ... + 42083273.

It is an arithmetic number, because the mean of its divisors is an integer number (184501245000).

Almost surely, 2^{3978660536901} is an apocalyptic number.

It is an amenable number.

3978660536901 is a deficient number, since it is larger than the sum of its proper divisors (1925379303099).

3978660536901 is a wasteful number, since it uses less digits than its factorization.

3978660536901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97210 (or 97204 counting only the distinct ones).

The product of its (nonzero) digits is 44089920, while the sum is 63.

Adding to 3978660536901 its sum of digits (63), we get a square (3978660536964 = 1994658²).

The spelling of 3978660536901 in words is "three trillion, nine hundred seventy-eight billion, six hundred sixty million, five hundred thirty-six thousand, nine hundred one".