91037299428 has 144 divisors (see below), whose sum is σ = 245197854720. Its totient is φ = 28398278592.

The previous prime is 91037299391. The next prime is 91037299433. The reversal of 91037299428 is 82499273019.

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, 32899701 + ... + 32902467.

It is an arithmetic number, because the mean of its divisors is an integer number (1702762880).

Almost surely, 2^91037299428 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 91037299428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122598927360).

91037299428 is an abundant number, since it is smaller than the sum of its proper divisors (154160555292).

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

91037299428 is a wasteful number, since it uses less digits than its factorization.

91037299428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3366 (or 3361 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The spelling of 91037299428 in words is "ninety-one billion, thirty-seven million, two hundred ninety-nine thousand, four hundred twenty-eight".