918631571456 has 56 divisors (see below), whose sum is σ = 1848424557144. Its totient is φ = 456497233920.

The previous prime is 918631571453. The next prime is 918631571477. The reversal of 918631571456 is 654175136819.

It is a super-4 number, since 4×918631571456⁴ (a number of 49 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918631571453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 991316 + ... + 1679276.

Almost surely, 2^918631571456 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 918631571456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (924212278572).

918631571456 is an abundant number, since it is smaller than the sum of its proper divisors (929792985688).

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

918631571456 is an equidigital number, since it uses as much as digits as its factorization.

918631571456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688150 (or 688126 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 56.

The spelling of 918631571456 in words is "nine hundred eighteen billion, six hundred thirty-one million, five hundred seventy-one thousand, four hundred fifty-six".