91391108472400 has 240 divisors, whose sum is σ = 253673499981888. Its totient is φ = 31271353344000.

The previous prime is 91391108472311. The next prime is 91391108472401. The reversal of 91391108472400 is 427480119319.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91391108472401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 345518599 + ... + 345783001.

Almost surely, 2^{91391108472400} 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 91391108472400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126836749990944).

91391108472400 is an abundant number, since it is smaller than the sum of its proper divisors (162282391509488).

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

91391108472400 is a wasteful number, since it uses less digits than its factorization.

91391108472400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269070 (or 269059 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 49.

The spelling of 91391108472400 in words is "ninety-one trillion, three hundred ninety-one billion, one hundred eight million, four hundred seventy-two thousand, four hundred".