91454135136 has 384 divisors, whose sum is σ = 320145509376. Its totient is φ = 22171484160.

The previous prime is 91454135117. The next prime is 91454135209. The reversal of 91454135136 is 63153145419.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6378856 + ... + 6393176.

It is an arithmetic number, because the mean of its divisors is an integer number (833712264).

Almost surely, 2^91454135136 is an apocalyptic number.

91454135136 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91454135136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160072754688).

91454135136 is an abundant number, since it is smaller than the sum of its proper divisors (228691374240).

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

91454135136 is a wasteful number, since it uses less digits than its factorization.

91454135136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14414 (or 14406 counting only the distinct ones).

The product of its digits is 194400, while the sum is 42.

The spelling of 91454135136 in words is "ninety-one billion, four hundred fifty-four million, one hundred thirty-five thousand, one hundred thirty-six".