56201066221550 has 24 divisors (see below), whose sum is σ = 107906047148352. Its totient is φ = 21755251440000.

The previous prime is 56201066221523. The next prime is 56201066221577. The reversal of 56201066221550 is 5512266010265.

It is an interprime number because it is at equal distance from previous prime (56201066221523) and next prime (56201066221577).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 56201066221498 and 56201066221507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18129374651 + ... + 18129377750.

It is an arithmetic number, because the mean of its divisors is an integer number (4496085297848).

Almost surely, 2^{56201066221550} is an apocalyptic number.

56201066221550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

56201066221550 is a deficient number, since it is larger than the sum of its proper divisors (51704980926802).

56201066221550 is a wasteful number, since it uses less digits than its factorization.

56201066221550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36258752444 (or 36258752439 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 56201066221550 in words is "fifty-six trillion, two hundred one billion, sixty-six million, two hundred twenty-one thousand, five hundred fifty".