65731780468 has 24 divisors (see below), whose sum is σ = 115234499520. Its totient is φ = 32807678400.

The previous prime is 65731780463. The next prime is 65731780489. The reversal of 65731780468 is 86408713756.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65731780463) 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, 13225888 + ... + 13230856.

It is an arithmetic number, because the mean of its divisors is an integer number (4801437480).

Almost surely, 2^65731780468 is an apocalyptic number.

It is an amenable number.

65731780468 is a deficient number, since it is larger than the sum of its proper divisors (49502719052).

65731780468 is a wasteful number, since it uses less digits than its factorization.

65731780468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10167 (or 10165 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 55.

The spelling of 65731780468 in words is "sixty-five billion, seven hundred thirty-one million, seven hundred eighty thousand, four hundred sixty-eight".