5661456356464 has 40 divisors (see below), whose sum is σ = 11453359250592. Its totient is φ = 2705909268480.

The previous prime is 5661456356459. The next prime is 5661456356473. The reversal of 5661456356464 is 4646536541665.

It is a happy number.

It is a super-2 number, since 2×5661456356464² (a number of 26 digits) contains 22 as substring.

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, 4381617 + ... + 5524624.

Almost surely, 2^{5661456356464} is an apocalyptic number.

It is an amenable number.

5661456356464 is an abundant number, since it is smaller than the sum of its proper divisors (5791902894128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5661456356464 is a wasteful number, since it uses less digits than its factorization.

5661456356464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9907825 (or 9907819 counting only the distinct ones).

The product of its digits is 186624000, while the sum is 61.

The spelling of 5661456356464 in words is "five trillion, six hundred sixty-one billion, four hundred fifty-six million, three hundred fifty-six thousand, four hundred sixty-four".