764064678633 has 4 divisors (see below), whose sum is σ = 1018752904848. Its totient is φ = 509376452420.

The previous prime is 764064678631. The next prime is 764064678661. The reversal of 764064678633 is 336876460467.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 764064678633 - 2¹ = 764064678631 is a prime.

It is not an unprimeable number, because it can be changed into a prime (764064678631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127344113103 + ... + 127344113108.

It is an arithmetic number, because the mean of its divisors is an integer number (254688226212).

Almost surely, 2^764064678633 is an apocalyptic number.

It is an amenable number.

764064678633 is a deficient number, since it is larger than the sum of its proper divisors (254688226215).

764064678633 is a wasteful number, since it uses less digits than its factorization.

764064678633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254688226214.

The product of its (nonzero) digits is 73156608, while the sum is 60.

The spelling of 764064678633 in words is "seven hundred sixty-four billion, sixty-four million, six hundred seventy-eight thousand, six hundred thirty-three".