55394021456656 has 15 divisors (see below), whose sum is σ = 107325974253351. Its totient is φ = 27696995842896.

The previous prime is 55394021456629. The next prime is 55394021456789. The reversal of 55394021456656 is 65665412049355.

The square root of 55394021456656 is 7442716.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×55394021456656² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55394021456594 and 55394021456603.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 28840525 + ... + 30701203.

Almost surely, 2^{55394021456656} is an apocalyptic number.

55394021456656 is the 7442716-th square number.

It is an amenable number.

55394021456656 is a deficient number, since it is larger than the sum of its proper divisors (51931952796695).

55394021456656 is an frugal number, since it uses more digits than its factorization.

55394021456656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3721366 (or 1860681 counting only the distinct ones).

The product of its (nonzero) digits is 116640000, while the sum is 61.

The spelling of 55394021456656 in words is "fifty-five trillion, three hundred ninety-four billion, twenty-one million, four hundred fifty-six thousand, six hundred fifty-six".