77967796253 has 4 divisors (see below), whose sum is σ = 78006919068. Its totient is φ = 77928673440.

The previous prime is 77967796243. The next prime is 77967796261. The reversal of 77967796253 is 35269776977.

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 59861940889 + 18105855364 = 244667^2 + 134558^2 .

It is a cyclic number.

It is not a de Polignac number, because 77967796253 - 2¹² = 77967792157 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 (77967796243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19558418 + ... + 19562403.

It is an arithmetic number, because the mean of its divisors is an integer number (19501729767).

Almost surely, 2^77967796253 is an apocalyptic number.

It is an amenable number.

77967796253 is a deficient number, since it is larger than the sum of its proper divisors (39122815).

77967796253 is a wasteful number, since it uses less digits than its factorization.

77967796253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39122814.

The product of its digits is 210039480, while the sum is 68.

The spelling of 77967796253 in words is "seventy-seven billion, nine hundred sixty-seven million, seven hundred ninety-six thousand, two hundred fifty-three".