94621890665 has 4 divisors (see below), whose sum is σ = 113546268804. Its totient is φ = 75697512528.

The previous prime is 94621890647. The next prime is 94621890677. The reversal of 94621890665 is 56609812649.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56609812649 = 13 ⋅4354600973.

It can be written as a sum of positive squares in 2 ways, for example, as 22078393744 + 72543496921 = 148588^2 + 269339^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-94621890665 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 94621890665.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9462189062 + ... + 9462189071.

It is an arithmetic number, because the mean of its divisors is an integer number (28386567201).

Almost surely, 2^94621890665 is an apocalyptic number.

It is an amenable number.

94621890665 is a deficient number, since it is larger than the sum of its proper divisors (18924378139).

94621890665 is a wasteful number, since it uses less digits than its factorization.

94621890665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18924378138.

The product of its (nonzero) digits is 5598720, while the sum is 56.

The spelling of 94621890665 in words is "ninety-four billion, six hundred twenty-one million, eight hundred ninety thousand, six hundred sixty-five".