65356820984 has 32 divisors (see below), whose sum is σ = 150823434720. Its totient is φ = 25855445376.

The previous prime is 65356820983. The next prime is 65356820987. The reversal of 65356820984 is 48902865356.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65356820983) 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, 44887199 + ... + 44888654.

It is an arithmetic number, because the mean of its divisors is an integer number (4713232335).

Almost surely, 2^65356820984 is an apocalyptic number.

It is an amenable number.

65356820984 is an abundant number, since it is smaller than the sum of its proper divisors (85466613736).

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

65356820984 is a wasteful number, since it uses less digits than its factorization.

65356820984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89775879 (or 89775875 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 56.

The spelling of 65356820984 in words is "sixty-five billion, three hundred fifty-six million, eight hundred twenty thousand, nine hundred eighty-four".