55697915448 has 144 divisors (see below), whose sum is σ = 175565693160. Its totient is φ = 15905635200.

The previous prime is 55697915447. The next prime is 55697915459. The reversal of 55697915448 is 84451979655.

55697915448 is a `hidden beast` number, since 55 + 69 + 79 + 15 + 448 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55697915443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12596278 + ... + 12600698.

Almost surely, 2^55697915448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55697915448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87782846580).

55697915448 is an abundant number, since it is smaller than the sum of its proper divisors (119867777712).

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

55697915448 is a wasteful number, since it uses less digits than its factorization.

55697915448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8018 (or 8004 counting only the distinct ones).

The product of its digits is 54432000, while the sum is 63.

The spelling of 55697915448 in words is "fifty-five billion, six hundred ninety-seven million, nine hundred fifteen thousand, four hundred forty-eight".