3954388620656 has 40 divisors (see below), whose sum is σ = 7732284678000. Its totient is φ = 1959026508800.

The previous prime is 3954388620647. The next prime is 3954388620731. The reversal of 3954388620656 is 6560268834593.

It is a junction number, because it is equal to n+sod(n) for n = 3954388620592 and 3954388620601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1112246 + ... + 3024213.

It is an arithmetic number, because the mean of its divisors is an integer number (193307116950).

Almost surely, 2^{3954388620656} is an apocalyptic number.

It is an amenable number.

3954388620656 is a deficient number, since it is larger than the sum of its proper divisors (3777896057344).

3954388620656 is a wasteful number, since it uses less digits than its factorization.

3954388620656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4137017 (or 4137011 counting only the distinct ones).

The product of its (nonzero) digits is 223948800, while the sum is 65.

The spelling of 3954388620656 in words is "three trillion, nine hundred fifty-four billion, three hundred eighty-eight million, six hundred twenty thousand, six hundred fifty-six".