76738953209 has 4 divisors (see below), whose sum is σ = 76746168720. Its totient is φ = 76731737700.

The previous prime is 76738953191. The next prime is 76738953223. The reversal of 76738953209 is 90235983767.

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 a de Polignac number, because none of the positive numbers 2^k-76738953209 is a prime.

It is a super-2 number, since 2×76738953209² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76738953409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3591779 + ... + 3613080.

It is an arithmetic number, because the mean of its divisors is an integer number (19186542180).

Almost surely, 2^76738953209 is an apocalyptic number.

It is an amenable number.

76738953209 is a deficient number, since it is larger than the sum of its proper divisors (7215511).

76738953209 is a wasteful number, since it uses less digits than its factorization.

76738953209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7215510.

The product of its (nonzero) digits is 17146080, while the sum is 59.

The spelling of 76738953209 in words is "seventy-six billion, seven hundred thirty-eight million, nine hundred fifty-three thousand, two hundred nine".