91455505555 has 8 divisors (see below), whose sum is σ = 110833207344. Its totient is φ = 72440004000.

The previous prime is 91455505529. The next prime is 91455505571. The reversal of 91455505555 is 55550555419.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91455505555 - 2³⁵ = 57095767187 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91455505499 and 91455505508.

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, 90549501 + ... + 90550510.

It is an arithmetic number, because the mean of its divisors is an integer number (13854150918).

Almost surely, 2^91455505555 is an apocalyptic number.

91455505555 is a deficient number, since it is larger than the sum of its proper divisors (19377701789).

91455505555 is a wasteful number, since it uses less digits than its factorization.

91455505555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181100117.

The product of its (nonzero) digits is 2812500, while the sum is 49.

The spelling of 91455505555 in words is "ninety-one billion, four hundred fifty-five million, five hundred five thousand, five hundred fifty-five".