65622963893994 has 96 divisors (see below), whose sum is σ = 158886879750144. Its totient is φ = 20179536246720.

The previous prime is 65622963893983. The next prime is 65622963894013. The reversal of 65622963893994 is 49939836922656.

It is a happy number.

65622963893994 is a `hidden beast` number, since 6 + 5 + 6 + 229 + 6 + 389 + 3 + 9 + 9 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7383964 + ... + 13629704.

It is an arithmetic number, because the mean of its divisors is an integer number (1655071664064).

Almost surely, 2^{65622963893994} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65622963893994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79443439875072).

65622963893994 is an abundant number, since it is smaller than the sum of its proper divisors (93263915856150).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65622963893994 is a wasteful number, since it uses less digits than its factorization.

65622963893994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6247434 (or 6247422 counting only the distinct ones).

The product of its digits is 8162933760, while the sum is 81.

The spelling of 65622963893994 in words is "sixty-five trillion, six hundred twenty-two billion, nine hundred sixty-three million, eight hundred ninety-three thousand, nine hundred ninety-four".