918637903936 has 63 divisors (see below), whose sum is σ = 1905991453821. Its totient is φ = 439264218624.

The previous prime is 918637903919. The next prime is 918637903943. The reversal of 918637903936 is 639309736819.

The square root of 918637903936 is 958456.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 901086953536 + 17550950400 = 949256^2 + 132480^2 .

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 176353300 + ... + 176358508.

Almost surely, 2^918637903936 is an apocalyptic number.

918637903936 is the 958456-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 918637903936

918637903936 is an abundant number, since it is smaller than the sum of its proper divisors (987353549885).

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

918637903936 is an frugal number, since it uses more digits than its factorization.

918637903936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10476 (or 5234 counting only the distinct ones).

The product of its (nonzero) digits is 39680928, while the sum is 64.

Multiplying 918637903936 by its sum of digits (64), we get a square (58792825851904 = 7667648²).

918637903936 divided by its sum of digits (64) gives a square (14353717249 = 119807²).

The spelling of 918637903936 in words is "nine hundred eighteen billion, six hundred thirty-seven million, nine hundred three thousand, nine hundred thirty-six".