91354197312 has 672 divisors, whose sum is σ = 324872421120. Its totient is φ = 23967498240.

The previous prime is 91354197301. The next prime is 91354197313. The reversal of 91354197312 is 21379145319.

91354197312 is a `hidden beast` number, since 9 + 1 + 3 + 541 + 97 + 3 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

Its product of digits (204120) is a multiple of the sum of its prime divisors (378).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91354197313) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 528058858 + ... + 528059030.

Almost surely, 2^91354197312 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 91354197312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162436210560).

91354197312 is an abundant number, since it is smaller than the sum of its proper divisors (233518223808).

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

91354197312 is a wasteful number, since it uses less digits than its factorization.

91354197312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391 (or 378 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The spelling of 91354197312 in words is "ninety-one billion, three hundred fifty-four million, one hundred ninety-seven thousand, three hundred twelve".