91550420297 has 16 divisors (see below), whose sum is σ = 110816709120. Its totient is φ = 73833796608.

The previous prime is 91550420281. The next prime is 91550420341. The reversal of 91550420297 is 79202405519.

It is a cyclic number.

It is not a de Polignac number, because 91550420297 - 2⁴ = 91550420281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91550420257) 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, 292529 + ... + 518337.

It is an arithmetic number, because the mean of its divisors is an integer number (6926044320).

Almost surely, 2^91550420297 is an apocalyptic number.

It is an amenable number.

91550420297 is a deficient number, since it is larger than the sum of its proper divisors (19266288823).

91550420297 is a wasteful number, since it uses less digits than its factorization.

91550420297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229240.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 91550420297 in words is "ninety-one billion, five hundred fifty million, four hundred twenty thousand, two hundred ninety-seven".