55431992770560 has 2720 divisors, whose sum is σ = 237501054650112. Its totient is φ = 12108284559360.

The previous prime is 55431992770423. The next prime is 55431992770573. The reversal of 55431992770560 is 6507729913455.

55431992770560 is a `hidden beast` number, since 5 + 5 + 43 + 1 + 9 + 9 + 27 + 7 + 0 + 560 = 666.

It is a super-2 number, since 2×55431992770560² (a number of 28 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 759342366684 + ... + 759342366756.

Almost surely, 2^{55431992770560} 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 55431992770560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118750527325056).

55431992770560 is an abundant number, since it is smaller than the sum of its proper divisors (182069061879552).

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

55431992770560 is an frugal number, since it uses more digits than its factorization.

55431992770560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 218 counting only the distinct ones).

The product of its (nonzero) digits is 71442000, while the sum is 63.

The spelling of 55431992770560 in words is "fifty-five trillion, four hundred thirty-one billion, nine hundred ninety-two million, seven hundred seventy thousand, five hundred sixty".