91551093528 has 32 divisors (see below), whose sum is σ = 229031535600. Its totient is φ = 30496524288.

The previous prime is 91551093437. The next prime is 91551093559. The reversal of 91551093528 is 82539015519.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1245201 + ... + 1316672.

Almost surely, 2^91551093528 is an apocalyptic number.

It is an amenable number.

91551093528 is an abundant number, since it is smaller than the sum of its proper divisors (137480442072).

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

91551093528 is a wasteful number, since it uses less digits than its factorization.

91551093528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2563371 (or 2563367 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 48.

The spelling of 91551093528 in words is "ninety-one billion, five hundred fifty-one million, ninety-three thousand, five hundred twenty-eight".