77663454613 has 4 divisors (see below), whose sum is σ = 78822610720. Its totient is φ = 76504298508.

The previous prime is 77663454581. The next prime is 77663454697. The reversal of 77663454613 is 31645436677.

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 77663454613 - 2⁵ = 77663454581 is a prime.

It is a super-2 number, since 2×77663454613² (a number of 23 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 (77663754613) 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, 579577953 + ... + 579578086.

It is an arithmetic number, because the mean of its divisors is an integer number (19705652680).

Almost surely, 2^77663454613 is an apocalyptic number.

It is an amenable number.

77663454613 is a deficient number, since it is larger than the sum of its proper divisors (1159156107).

77663454613 is a wasteful number, since it uses less digits than its factorization.

77663454613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159156106.

The product of its digits is 7620480, while the sum is 52.

The spelling of 77663454613 in words is "seventy-seven billion, six hundred sixty-three million, four hundred fifty-four thousand, six hundred thirteen".