65681941392 has 40 divisors (see below), whose sum is σ = 188531499680. Its totient is φ = 21893980320.

The previous prime is 65681941343. The next prime is 65681941417. The reversal of 65681941392 is 29314918656.

65681941392 is a `hidden beast` number, since 6 + 5 + 68 + 194 + 1 + 392 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76020334 + ... + 76021197.

It is an arithmetic number, because the mean of its divisors is an integer number (4713287492).

Almost surely, 2^65681941392 is an apocalyptic number.

It is an amenable number.

65681941392 is an abundant number, since it is smaller than the sum of its proper divisors (122849558288).

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

65681941392 is a wasteful number, since it uses less digits than its factorization.

65681941392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152041548 (or 152041536 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The spelling of 65681941392 in words is "sixty-five billion, six hundred eighty-one million, nine hundred forty-one thousand, three hundred ninety-two".