91550420306 has 32 divisors (see below), whose sum is σ = 148065994560. Its totient is φ = 42314239296.

The previous prime is 91550420281. The next prime is 91550420341. The reversal of 91550420306 is 60302405519.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1601000 + ... + 1657196.

It is an arithmetic number, because the mean of its divisors is an integer number (4627062330).

Almost surely, 2^91550420306 is an apocalyptic number.

91550420306 is a deficient number, since it is larger than the sum of its proper divisors (56515574254).

91550420306 is a wasteful number, since it uses less digits than its factorization.

91550420306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57258.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 91550420306 in words is "ninety-one billion, five hundred fifty million, four hundred twenty thousand, three hundred six".