91656047826 has 192 divisors, whose sum is σ = 240400742400. Its totient is φ = 25633086336.

The previous prime is 91656047789. The next prime is 91656047851. The reversal of 91656047826 is 62874065619.

91656047826 is a `hidden beast` number, since 9 + 1 + 6 + 5 + 604 + 7 + 8 + 26 = 666.

It is a super-2 number, since 2×91656047826² (a number of 23 digits) contains 22 as substring.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 31184665 + ... + 31187603.

It is an arithmetic number, because the mean of its divisors is an integer number (1252087200).

Almost surely, 2^91656047826 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91656047826, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120200371200).

91656047826 is an abundant number, since it is smaller than the sum of its proper divisors (148744694574).

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

91656047826 is a wasteful number, since it uses less digits than its factorization.

91656047826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3155 (or 3143 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 91656047826 in words is "ninety-one billion, six hundred fifty-six million, forty-seven thousand, eight hundred twenty-six".