65442440436 has 96 divisors (see below), whose sum is σ = 155273395200. Its totient is φ = 21450631680.

The previous prime is 65442440387. The next prime is 65442440447. The reversal of 65442440436 is 63404424456.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105722535 + ... + 105723153.

It is an arithmetic number, because the mean of its divisors is an integer number (1617431200).

Almost surely, 2^65442440436 is an apocalyptic number.

It is an amenable number.

65442440436 is an abundant number, since it is smaller than the sum of its proper divisors (89830954764).

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

65442440436 is a wasteful number, since it uses less digits than its factorization.

65442440436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269 (or 1267 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 42.

The spelling of 65442440436 in words is "sixty-five billion, four hundred forty-two million, four hundred forty thousand, four hundred thirty-six".