918866955520 has 72 divisors (see below), whose sum is σ = 2201369959656. Its totient is φ = 367480578048.

The previous prime is 918866955469. The next prime is 918866955527. The reversal of 918866955520 is 25559668819.

It can be written as a sum of positive squares in 4 ways, for example, as 71789700096 + 847077255424 = 267936^2 + 920368^2 .

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918866955527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7378894 + ... + 7502386.

It is an arithmetic number, because the mean of its divisors is an integer number (30574582773).

Almost surely, 2^918866955520 is an apocalyptic number.

It is an amenable number.

918866955520 is an abundant number, since it is smaller than the sum of its proper divisors (1282503004136).

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

918866955520 is a wasteful number, since it uses less digits than its factorization.

918866955520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129327 (or 129313 counting only the distinct ones).

The product of its (nonzero) digits is 46656000, while the sum is 64.

The spelling of 918866955520 in words is "nine hundred eighteen billion, eight hundred sixty-six million, nine hundred fifty-five thousand, five hundred twenty".