765040065421 has 8 divisors (see below), whose sum is σ = 771197210624. Its totient is φ = 758885001840.

The previous prime is 765040065389. The next prime is 765040065451. The reversal of 765040065421 is 124560040567.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 765040065421 - 2⁵ = 765040065389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (765040065451) 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, 221836 + ... + 1256698.

It is an arithmetic number, because the mean of its divisors is an integer number (96399651328).

Almost surely, 2^765040065421 is an apocalyptic number.

It is an amenable number.

765040065421 is a deficient number, since it is larger than the sum of its proper divisors (6157145203).

765040065421 is a wasteful number, since it uses less digits than its factorization.

765040065421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040811.

The product of its (nonzero) digits is 201600, while the sum is 40.

The spelling of 765040065421 in words is "seven hundred sixty-five billion, forty million, sixty-five thousand, four hundred twenty-one".