91606628863 has 8 divisors (see below), whose sum is σ = 92149895600. Its totient is φ = 91064608128.

The previous prime is 91606628857. The next prime is 91606628873. The reversal of 91606628863 is 36882660619.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91606628863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91606628873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163818 + ... + 458311.

It is an arithmetic number, because the mean of its divisors is an integer number (11518736950).

Almost surely, 2^91606628863 is an apocalyptic number.

91606628863 is a deficient number, since it is larger than the sum of its proper divisors (543266737).

91606628863 is a wasteful number, since it uses less digits than its factorization.

91606628863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623001.

The product of its (nonzero) digits is 4478976, while the sum is 55.

The spelling of 91606628863 in words is "ninety-one billion, six hundred six million, six hundred twenty-eight thousand, eight hundred sixty-three".