91000001032 has 16 divisors (see below), whose sum is σ = 178043480640. Its totient is φ = 43521739536.

The previous prime is 91000001017. The next prime is 91000001039. The reversal of 91000001032 is 23010000019.

It is a junction number, because it is equal to n+sod(n) for n = 91000000997 and 91000001015.

It is not an unprimeable number, because it can be changed into a prime (91000001039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247282428 + ... + 247282795.

It is an arithmetic number, because the mean of its divisors is an integer number (11127717540).

Almost surely, 2^91000001032 is an apocalyptic number.

91000001032 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

91000001032 is a deficient number, since it is larger than the sum of its proper divisors (87043479608).

91000001032 is a wasteful number, since it uses less digits than its factorization.

91000001032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494565252 (or 494565248 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

The spelling of 91000001032 in words is "ninety-one billion, one thousand, thirty-two".