5655550590621 has 6 divisors (see below), whose sum is σ = 8169128630910. Its totient is φ = 3770367060408.

The previous prime is 5655550590617. The next prime is 5655550590629. The reversal of 5655550590621 is 1260950555565.

5655550590621 is a `hidden beast` number, since 5 + 6 + 5 + 5 + 5 + 5 + 0 + 5 + 9 + 0 + 621 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3830514408900 + 1825036181721 = 1957170^2 + 1350939^2 .

It is not a de Polignac number, because 5655550590621 - 2² = 5655550590617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5655550590629) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 314197255026 + ... + 314197255043.

It is an arithmetic number, because the mean of its divisors is an integer number (1361521438485).

Almost surely, 2^{5655550590621} is an apocalyptic number.

It is an amenable number.

5655550590621 is a deficient number, since it is larger than the sum of its proper divisors (2513578040289).

5655550590621 is a wasteful number, since it uses less digits than its factorization.

5655550590621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628394510075 (or 628394510072 counting only the distinct ones).

The product of its (nonzero) digits is 10125000, while the sum is 54.

The spelling of 5655550590621 in words is "five trillion, six hundred fifty-five billion, five hundred fifty million, five hundred ninety thousand, six hundred twenty-one".