91735181412 has 96 divisors (see below), whose sum is σ = 249246412800. Its totient is φ = 25719213312.

The previous prime is 91735181411. The next prime is 91735181441. The reversal of 91735181412 is 21418153719.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (91735181411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1039264 + ... + 1124072.

It is an arithmetic number, because the mean of its divisors is an integer number (2596316800).

Almost surely, 2^91735181412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91735181412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124623206400).

91735181412 is an abundant number, since it is smaller than the sum of its proper divisors (157511231388).

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

91735181412 is a wasteful number, since it uses less digits than its factorization.

91735181412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85065 (or 85063 counting only the distinct ones).

The product of its digits is 60480, while the sum is 42.

The spelling of 91735181412 in words is "ninety-one billion, seven hundred thirty-five million, one hundred eighty-one thousand, four hundred twelve".