64507763933 has 4 divisors (see below), whose sum is σ = 68302338300. Its totient is φ = 60713189568.

The previous prime is 64507763921. The next prime is 64507763953. The reversal of 64507763933 is 33936770546.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56436178969 + 8071584964 = 237563^2 + 89842^2 .

It is a cyclic number.

It is not a de Polignac number, because 64507763933 - 2⁴ = 64507763917 is a prime.

It is a super-2 number, since 2×64507763933² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64507763953) 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, 1897287158 + ... + 1897287191.

It is an arithmetic number, because the mean of its divisors is an integer number (17075584575).

Almost surely, 2^64507763933 is an apocalyptic number.

It is an amenable number.

64507763933 is a deficient number, since it is larger than the sum of its proper divisors (3794574367).

64507763933 is a wasteful number, since it uses less digits than its factorization.

64507763933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3794574366.

The product of its (nonzero) digits is 8573040, while the sum is 53.

The spelling of 64507763933 in words is "sixty-four billion, five hundred seven million, seven hundred sixty-three thousand, nine hundred thirty-three".