91869550455 has 16 divisors (see below), whose sum is σ = 146999493504. Its totient is φ = 48994356000.

The previous prime is 91869550447. The next prime is 91869550477. The reversal of 91869550455 is 55405596819.

It is a happy number.

It is not a de Polignac number, because 91869550455 - 2³ = 91869550447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91869550395 and 91869550404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122580 + ... + 445830.

It is an arithmetic number, because the mean of its divisors is an integer number (9187468344).

Almost surely, 2^91869550455 is an apocalyptic number.

91869550455 is a deficient number, since it is larger than the sum of its proper divisors (55129943049).

91869550455 is a wasteful number, since it uses less digits than its factorization.

91869550455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342206.

The product of its (nonzero) digits is 9720000, while the sum is 57.

The spelling of 91869550455 in words is "ninety-one billion, eight hundred sixty-nine million, five hundred fifty thousand, four hundred fifty-five".