3651552171656 has 16 divisors (see below), whose sum is σ = 7249405046940. Its totient is φ = 1718377492480.

The previous prime is 3651552171643. The next prime is 3651552171661. The reversal of 3651552171656 is 6561712551563.

It can be written as a sum of positive squares in 2 ways, for example, as 3464698276900 + 186853894756 = 1861370^2 + 432266^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3651552171598 and 3651552171607.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13424824025 + ... + 13424824296.

Almost surely, 2^{3651552171656} is an apocalyptic number.

It is an amenable number.

3651552171656 is a deficient number, since it is larger than the sum of its proper divisors (3597852875284).

3651552171656 is a wasteful number, since it uses less digits than its factorization.

3651552171656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26849648344 (or 26849648340 counting only the distinct ones).

The product of its digits is 5670000, while the sum is 53.

The spelling of 3651552171656 in words is "three trillion, six hundred fifty-one billion, five hundred fifty-two million, one hundred seventy-one thousand, six hundred fifty-six".