918944617920 has 224 divisors, whose sum is σ = 3530601105408. Its totient is φ = 197688901632.

The previous prime is 918944617891. The next prime is 918944617951. The reversal of 918944617920 is 29716449819.

It is a tau number, because it is divible by the number of its divisors (224).

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3907752 + ... + 4136231.

Almost surely, 2^918944617920 is an apocalyptic number.

It is an amenable number.

918944617920 is an abundant number, since it is smaller than the sum of its proper divisors (2611656487488).

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

918944617920 is a wasteful number, since it uses less digits than its factorization.

918944617920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8044027 (or 8044017 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 60.

The spelling of 918944617920 in words is "nine hundred eighteen billion, nine hundred forty-four million, six hundred seventeen thousand, nine hundred twenty".