79724661551 has 2 divisors, whose sum is σ = 79724661552. Its totient is φ = 79724661550.

The previous prime is 79724661529. The next prime is 79724661557. The reversal of 79724661551 is 15516642797.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79724661551 - 2³⁴ = 62544792367 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79724661493 and 79724661502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79724661557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39862330775 + 39862330776.

It is an arithmetic number, because the mean of its divisors is an integer number (39862330776).

Almost surely, 2^79724661551 is an apocalyptic number.

79724661551 is a deficient number, since it is larger than the sum of its proper divisors (1).

79724661551 is an equidigital number, since it uses as much as digits as its factorization.

79724661551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3175200, while the sum is 53.

The spelling of 79724661551 in words is "seventy-nine billion, seven hundred twenty-four million, six hundred sixty-one thousand, five hundred fifty-one".