91001020232 has 32 divisors (see below), whose sum is σ = 170991346680. Its totient is φ = 45403438080.

The previous prime is 91001020223. The next prime is 91001020267. The reversal of 91001020232 is 23202010019.

It can be written as a sum of positive squares in 4 ways, for example, as 83478233476 + 7522786756 = 288926^2 + 86734^2 .

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, 7697558 + ... + 7709370.

Almost surely, 2^91001020232 is an apocalyptic number.

It is an amenable number.

91001020232 is a deficient number, since it is larger than the sum of its proper divisors (79990326448).

91001020232 is a wasteful number, since it uses less digits than its factorization.

91001020232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13793 (or 13789 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The spelling of 91001020232 in words is "ninety-one billion, one million, twenty thousand, two hundred thirty-two".