91156489403172 has 48 divisors (see below), whose sum is σ = 228117530612160. Its totient is φ = 28243122830208.

The previous prime is 91156489403167. The next prime is 91156489403207. The reversal of 91156489403172 is 27130498465119.

It is a super-3 number, since 3×91156489403172³ (a number of 43 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3771772483 + ... + 3771796650.

It is an arithmetic number, because the mean of its divisors is an integer number (4752448554420).

It is a 1-persistent number, because it is pandigital, but 2⋅91156489403172 = 182312978806344 is not.

Almost surely, 2^{91156489403172} is an apocalyptic number.

It is an amenable number.

91156489403172 is an abundant number, since it is smaller than the sum of its proper divisors (136961041208988).

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

91156489403172 is a wasteful number, since it uses less digits than its factorization.

91156489403172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7543569212 (or 7543569210 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 60.

The spelling of 91156489403172 in words is "ninety-one trillion, one hundred fifty-six billion, four hundred eighty-nine million, four hundred three thousand, one hundred seventy-two".