5651620635881 has 24 divisors (see below), whose sum is σ = 6355765329984. Its totient is φ = 5020141500000.

The previous prime is 5651620635833. The next prime is 5651620635907. The reversal of 5651620635881 is 1885360261565.

It is a happy number.

It is not a de Polignac number, because 5651620635881 - 2²² = 5651616441577 is a prime.

It is a super-2 number, since 2×5651620635881² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5651620635181) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1420895 + ... + 3649956.

It is an arithmetic number, because the mean of its divisors is an integer number (264823555416).

Almost surely, 2^{5651620635881} is an apocalyptic number.

It is an amenable number.

5651620635881 is a deficient number, since it is larger than the sum of its proper divisors (704144694103).

5651620635881 is a wasteful number, since it uses less digits than its factorization.

5651620635881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5071085 (or 5071074 counting only the distinct ones).

The product of its (nonzero) digits is 10368000, while the sum is 56.

The spelling of 5651620635881 in words is "five trillion, six hundred fifty-one billion, six hundred twenty million, six hundred thirty-five thousand, eight hundred eighty-one".