91222511057501 has 16 divisors (see below), whose sum is σ = 94842600840000. Its totient is φ = 87634829979648.

The previous prime is 91222511057467. The next prime is 91222511057539. The reversal of 91222511057501 is 10575011522219.

It is a cyclic number.

It is not a de Polignac number, because 91222511057501 - 2⁶ = 91222511057437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91222511557501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 349751 + ... + 13511748.

It is an arithmetic number, because the mean of its divisors is an integer number (5927662552500).

Almost surely, 2^{91222511057501} is an apocalyptic number.

It is an amenable number.

91222511057501 is a deficient number, since it is larger than the sum of its proper divisors (3620089782499).

91222511057501 is a wasteful number, since it uses less digits than its factorization.

91222511057501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13862668.

The product of its (nonzero) digits is 63000, while the sum is 41.

The spelling of 91222511057501 in words is "ninety-one trillion, two hundred twenty-two billion, five hundred eleven million, fifty-seven thousand, five hundred one".