55561040744400 has 180 divisors, whose sum is σ = 192819170762400. Its totient is φ = 14815745337600.

The previous prime is 55561040744357. The next prime is 55561040744411. The reversal of 55561040744400 is 444704016555.

55561040744400 is a `hidden beast` number, since 5 + 5 + 561 + 0 + 4 + 0 + 7 + 44 + 40 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (180).

It is a super-2 number, since 2×55561040744400² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 105573915 + ... + 106098885.

Almost surely, 2^{55561040744400} is an apocalyptic number.

55561040744400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55561040744400 is an abundant number, since it is smaller than the sum of its proper divisors (137258130018000).

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

55561040744400 is a wasteful number, since it uses less digits than its factorization.

55561040744400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554394 (or 554380 counting only the distinct ones).

The product of its (nonzero) digits is 1344000, while the sum is 45.

The spelling of 55561040744400 in words is "fifty-five trillion, five hundred sixty-one billion, forty million, seven hundred forty-four thousand, four hundred".