91641633402 has 32 divisors (see below), whose sum is σ = 200026459584. Its totient is φ = 27758931200.

The previous prime is 91641633383. The next prime is 91641633409. The reversal of 91641633402 is 20433614619.

It is not an unprimeable number, because it can be changed into a prime (91641633409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116799 + ... + 443762.

It is an arithmetic number, because the mean of its divisors is an integer number (6250826862).

Almost surely, 2^91641633402 is an apocalyptic number.

91641633402 is an abundant number, since it is smaller than the sum of its proper divisors (108384826182).

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

91641633402 is a wasteful number, since it uses less digits than its factorization.

91641633402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563054.

The product of its (nonzero) digits is 93312, while the sum is 39.

The spelling of 91641633402 in words is "ninety-one billion, six hundred forty-one million, six hundred thirty-three thousand, four hundred two".