91591671202 has 8 divisors (see below), whose sum is σ = 143360876736. Its totient is φ = 43804712292.

The previous prime is 91591671173. The next prime is 91591671203. The reversal of 91591671202 is 20217619519.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×91591671202² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91591671203) 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, 995561598 + ... + 995561689.

It is an arithmetic number, because the mean of its divisors is an integer number (17920109592).

Almost surely, 2^91591671202 is an apocalyptic number.

91591671202 is a deficient number, since it is larger than the sum of its proper divisors (51769205534).

91591671202 is a wasteful number, since it uses less digits than its factorization.

91591671202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991123312.

The product of its (nonzero) digits is 68040, while the sum is 43.

The spelling of 91591671202 in words is "ninety-one billion, five hundred ninety-one million, six hundred seventy-one thousand, two hundred two".