91099474655 has 16 divisors (see below), whose sum is σ = 129244576320. Its totient is φ = 60314134272.

The previous prime is 91099474649. The next prime is 91099474663. The reversal of 91099474655 is 55647499019.

It is not a de Polignac number, because 91099474655 - 2¹² = 91099470559 is a prime.

It is a super-2 number, since 2×91099474655² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91099474594 and 91099474603.

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, 44875574 + ... + 44877603.

It is an arithmetic number, because the mean of its divisors is an integer number (8077786020).

Almost surely, 2^91099474655 is an apocalyptic number.

91099474655 is a deficient number, since it is larger than the sum of its proper divisors (38145101665).

91099474655 is a wasteful number, since it uses less digits than its factorization.

91099474655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89753218.

The product of its (nonzero) digits is 12247200, while the sum is 59.

The spelling of 91099474655 in words is "ninety-one billion, ninety-nine million, four hundred seventy-four thousand, six hundred fifty-five".