55997457400 has 96 divisors (see below), whose sum is σ = 139632692400. Its totient is φ = 20819635200.

The previous prime is 55997457367. The next prime is 55997457409. The reversal of 55997457400 is 475479955.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55997457409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62380 + ... + 340420.

Almost surely, 2^55997457400 is an apocalyptic number.

55997457400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55997457400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69816346200).

55997457400 is an abundant number, since it is smaller than the sum of its proper divisors (83635235000).

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

55997457400 is a wasteful number, since it uses less digits than its factorization.

55997457400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278129 (or 278120 counting only the distinct ones).

The product of its (nonzero) digits is 7938000, while the sum is 55.

The spelling of 55997457400 in words is "fifty-five billion, nine hundred ninety-seven million, four hundred fifty-seven thousand, four hundred".