55978613604 has 81 divisors (see below), whose sum is σ = 144748747507. Its totient is φ = 18240759408.

The previous prime is 55978613563. The next prime is 55978613623. The reversal of 55978613604 is 40631687955.

The square root of 55978613604 is 236598.

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

55978613604 is a `hidden beast` number, since 559 + 7 + 86 + 1 + 3 + 6 + 0 + 4 = 666.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 66720217 + ... + 66721055.

Almost surely, 2^55978613604 is an apocalyptic number.

55978613604 is the 236598-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55978613604

55978613604 is an abundant number, since it is smaller than the sum of its proper divisors (88770133903).

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

55978613604 is an equidigital number, since it uses as much as digits as its factorization.

55978613604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782 (or 891 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 54.

The spelling of 55978613604 in words is "fifty-five billion, nine hundred seventy-eight million, six hundred thirteen thousand, six hundred four".