91149287802 has 16 divisors (see below), whose sum is σ = 182351350272. Its totient is φ = 30374300160.

The previous prime is 91149287771. The next prime is 91149287837. The reversal of 91149287802 is 20878294119.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2176474 + ... + 2217957.

It is an arithmetic number, because the mean of its divisors is an integer number (11396959392).

Almost surely, 2^91149287802 is an apocalyptic number.

91149287802 is an abundant number, since it is smaller than the sum of its proper divisors (91202062470).

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

91149287802 is a wasteful number, since it uses less digits than its factorization.

91149287802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4397893.

The product of its (nonzero) digits is 580608, while the sum is 51.

The spelling of 91149287802 in words is "ninety-one billion, one hundred forty-nine million, two hundred eighty-seven thousand, eight hundred two".