3655587816881 has 48 divisors (see below), whose sum is σ = 4994350900224. Its totient is φ = 2603359440000.

The previous prime is 3655587816799. The next prime is 3655587816889. The reversal of 3655587816881 is 1886187855563.

3655587816881 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3655587816881 - 2²² = 3655583622577 is a prime.

It is a super-2 number, since 2×3655587816881² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3655587816889) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 531425 + ... + 2755646.

It is an arithmetic number, because the mean of its divisors is an integer number (104048977088).

Almost surely, 2^{3655587816881} is an apocalyptic number.

It is an amenable number.

3655587816881 is a deficient number, since it is larger than the sum of its proper divisors (1338763083343).

3655587816881 is a wasteful number, since it uses less digits than its factorization.

3655587816881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3287214 (or 3287203 counting only the distinct ones).

The product of its digits is 387072000, while the sum is 71.

The spelling of 3655587816881 in words is "three trillion, six hundred fifty-five billion, five hundred eighty-seven million, eight hundred sixteen thousand, eight hundred eighty-one".