916991158428 has 18 divisors (see below), whose sum is σ = 2317949872784. Its totient is φ = 305663719464.

The previous prime is 916991158399. The next prime is 916991158441. The reversal of 916991158428 is 824851199619.

916991158428 is a `hidden beast` number, since 9 + 1 + 6 + 99 + 115 + 8 + 428 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12735988276 + ... + 12735988347.

Almost surely, 2^916991158428 is an apocalyptic number.

It is an amenable number.

916991158428 is an abundant number, since it is smaller than the sum of its proper divisors (1400958714356).

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

916991158428 is a wasteful number, since it uses less digits than its factorization.

916991158428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25471976633 (or 25471976628 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 63.

The spelling of 916991158428 in words is "nine hundred sixteen billion, nine hundred ninety-one million, one hundred fifty-eight thousand, four hundred twenty-eight".