91479628800 has 1584 divisors, whose sum is σ = 406845671520. Its totient is φ = 20065812480.

The previous prime is 91479628789. The next prime is 91479628817. The reversal of 91479628800 is 882697419.

91479628800 is a `hidden beast` number, since 9 + 1 + 4 + 7 + 9 + 628 + 8 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1253145564 + ... + 1253145636.

Almost surely, 2^91479628800 is an apocalyptic number.

91479628800 is a gapful number since it is divisible by the number (90) 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 91479628800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203422835760).

91479628800 is an abundant number, since it is smaller than the sum of its proper divisors (315366042720).

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

91479628800 is a wasteful number, since it uses less digits than its factorization.

91479628800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 91479628800 in words is "ninety-one billion, four hundred seventy-nine million, six hundred twenty-eight thousand, eight hundred".