91610100728 has 16 divisors (see below), whose sum is σ = 173289019680. Its totient is φ = 45399695488.

The previous prime is 91610100697. The next prime is 91610100733. The reversal of 91610100728 is 82700101619.

It is a super-2 number, since 2×91610100728² (a number of 23 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 50668400 + ... + 50670207.

It is an arithmetic number, because the mean of its divisors is an integer number (10830563730).

Almost surely, 2^91610100728 is an apocalyptic number.

It is an amenable number.

91610100728 is a deficient number, since it is larger than the sum of its proper divisors (81678918952).

91610100728 is a wasteful number, since it uses less digits than its factorization.

91610100728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101338726 (or 101338722 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 35.

The spelling of 91610100728 in words is "ninety-one billion, six hundred ten million, one hundred thousand, seven hundred twenty-eight".