91421624946 has 16 divisors (see below), whose sum is σ = 182869974144. Its totient is φ = 30469420944.

The previous prime is 91421624923. The next prime is 91421624993. The reversal of 91421624946 is 64942612419.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 91421624895 and 91421624904.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1068901 + ... + 1151256.

It is an arithmetic number, because the mean of its divisors is an integer number (11429373384).

Almost surely, 2^91421624946 is an apocalyptic number.

91421624946 is an abundant number, since it is smaller than the sum of its proper divisors (91448349198).

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

91421624946 is a wasteful number, since it uses less digits than its factorization.

91421624946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2227025.

The product of its digits is 746496, while the sum is 48.

The spelling of 91421624946 in words is "ninety-one billion, four hundred twenty-one million, six hundred twenty-four thousand, nine hundred forty-six".