91299280512 has 256 divisors, whose sum is σ = 268423787520. Its totient is φ = 27265105920.

The previous prime is 91299280507. The next prime is 91299280591. The reversal of 91299280512 is 21508299219.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 181509253 + ... + 181509755.

It is an arithmetic number, because the mean of its divisors is an integer number (1048530420).

Almost surely, 2^91299280512 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 91299280512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134211893760).

91299280512 is an abundant number, since it is smaller than the sum of its proper divisors (177124507008).

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

91299280512 is a wasteful number, since it uses less digits than its factorization.

91299280512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071 (or 1059 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 48.

The spelling of 91299280512 in words is "ninety-one billion, two hundred ninety-nine million, two hundred eighty thousand, five hundred twelve".