91609044862 has 4 divisors (see below), whose sum is σ = 137413567296. Its totient is φ = 45804522430.

The previous prime is 91609044851. The next prime is 91609044869. The reversal of 91609044862 is 26844090619.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91609044869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22902261214 + ... + 22902261217.

It is an arithmetic number, because the mean of its divisors is an integer number (34353391824).

Almost surely, 2^91609044862 is an apocalyptic number.

91609044862 is a deficient number, since it is larger than the sum of its proper divisors (45804522434).

91609044862 is a wasteful number, since it uses less digits than its factorization.

91609044862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45804522433.

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 91609044862 in words is "ninety-one billion, six hundred nine million, forty-four thousand, eight hundred sixty-two".