55431707631744 has 256 divisors, whose sum is σ = 155862848655360. Its totient is φ = 17427394252800.

The previous prime is 55431707631743. The next prime is 55431707631841. The reversal of 55431707631744 is 44713670713455.

It is a happy number.

It is a super-2 number, since 2×55431707631744² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55431707631743) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 235855539 + ... + 236090445.

It is an arithmetic number, because the mean of its divisors is an integer number (608839252560).

Almost surely, 2^{55431707631744} 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 55431707631744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77931424327680).

55431707631744 is an abundant number, since it is smaller than the sum of its proper divisors (100431141023616).

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

55431707631744 is a wasteful number, since it uses less digits than its factorization.

55431707631744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235459 (or 235447 counting only the distinct ones).

The product of its (nonzero) digits is 29635200, while the sum is 57.

The spelling of 55431707631744 in words is "fifty-five trillion, four hundred thirty-one billion, seven hundred seven million, six hundred thirty-one thousand, seven hundred forty-four".