918581064 has 32 divisors (see below), whose sum is σ = 2306322720. Its totient is φ = 304877696.

The previous prime is 918581047. The next prime is 918581071. The reversal of 918581064 is 460185819.

It is a super-2 number, since 2×918581064² = 1687582342278744192, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76542 + ... + 87725.

It is an arithmetic number, because the mean of its divisors is an integer number (72072585).

Almost surely, 2^918581064 is an apocalyptic number.

It is an amenable number.

918581064 is an abundant number, since it is smaller than the sum of its proper divisors (1387741656).

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

918581064 is a wasteful number, since it uses less digits than its factorization.

918581064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164509 (or 164505 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 918581064 is about 30308.1022830530. The cubic root of 918581064 is about 972.0885539737.

The spelling of 918581064 in words is "nine hundred eighteen million, five hundred eighty-one thousand, sixty-four".