91653561545 has 64 divisors (see below), whose sum is σ = 140256990720. Its totient is φ = 55945064448.

The previous prime is 91653561523. The next prime is 91653561551. The reversal of 91653561545 is 54516535619.

It is a happy number.

It is not a de Polignac number, because 91653561545 - 2²² = 91649367241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91653561493 and 91653561502.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1878266 + ... + 1926444.

It is an arithmetic number, because the mean of its divisors is an integer number (2191515480).

Almost surely, 2^91653561545 is an apocalyptic number.

It is an amenable number.

91653561545 is a deficient number, since it is larger than the sum of its proper divisors (48603429175).

91653561545 is a wasteful number, since it uses less digits than its factorization.

91653561545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48354.

The product of its digits is 2430000, while the sum is 50.

The spelling of 91653561545 in words is "ninety-one billion, six hundred fifty-three million, five hundred sixty-one thousand, five hundred forty-five".