55457997270 has 96 divisors (see below), whose sum is σ = 144251269632. Its totient is φ = 13639257216.

The previous prime is 55457997253. The next prime is 55457997347. The reversal of 55457997270 is 7279975455.

It is a happy number.

It is a super-2 number, since 2×55457997270² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6723769 + ... + 6732011.

It is an arithmetic number, because the mean of its divisors is an integer number (1502617392).

Almost surely, 2^55457997270 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55457997270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72125634816).

55457997270 is an abundant number, since it is smaller than the sum of its proper divisors (88793272362).

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

55457997270 is a wasteful number, since it uses less digits than its factorization.

55457997270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9606 (or 9593 counting only the distinct ones).

The product of its (nonzero) digits is 27783000, while the sum is 60.

The spelling of 55457997270 in words is "fifty-five billion, four hundred fifty-seven million, nine hundred ninety-seven thousand, two hundred seventy".