91226611420 has 144 divisors (see below), whose sum is σ = 239833524672. Its totient is φ = 28954920960.

The previous prime is 91226611387. The next prime is 91226611447. The reversal of 91226611420 is 2411662219.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 971377 + ... + 1061143.

It is an arithmetic number, because the mean of its divisors is an integer number (1665510588).

Almost surely, 2^91226611420 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 91226611420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119916762336).

91226611420 is an abundant number, since it is smaller than the sum of its proper divisors (148606913252).

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

91226611420 is a wasteful number, since it uses less digits than its factorization.

91226611420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89868 (or 89859 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 91226611420 in words is "ninety-one billion, two hundred twenty-six million, six hundred eleven thousand, four hundred twenty".