91497027930 has 256 divisors, whose sum is σ = 283183644672. Its totient is φ = 18361728000.

The previous prime is 91497027917. The next prime is 91497028061. The reversal of 91497027930 is 3972079419.

It is a super-2 number, since 2×91497027930² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 47333244 + ... + 47335176.

It is an arithmetic number, because the mean of its divisors is an integer number (1106186112).

Almost surely, 2^91497027930 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91497027930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141591822336).

91497027930 is an abundant number, since it is smaller than the sum of its proper divisors (191686616742).

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

91497027930 is a wasteful number, since it uses less digits than its factorization.

91497027930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2653.

The product of its (nonzero) digits is 857304, while the sum is 51.

The spelling of 91497027930 in words is "ninety-one billion, four hundred ninety-seven million, twenty-seven thousand, nine hundred thirty".