76899995213 has 4 divisors (see below), whose sum is σ = 78978373500. Its totient is φ = 74821616928.

The previous prime is 76899995209. The next prime is 76899995251. The reversal of 76899995213 is 31259999867.

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 56044880644 + 20855114569 = 236738^2 + 144413^2 .

It is a cyclic number.

It is not a de Polignac number, because 76899995213 - 2² = 76899995209 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 (76899995113) 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, 1039189088 + ... + 1039189161.

It is an arithmetic number, because the mean of its divisors is an integer number (19744593375).

Almost surely, 2^76899995213 is an apocalyptic number.

It is an amenable number.

76899995213 is a deficient number, since it is larger than the sum of its proper divisors (2078378287).

76899995213 is a wasteful number, since it uses less digits than its factorization.

76899995213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2078378286.

The product of its digits is 66134880, while the sum is 68.

The spelling of 76899995213 in words is "seventy-six billion, eight hundred ninety-nine million, nine hundred ninety-five thousand, two hundred thirteen".