79944444451 has 2 divisors, whose sum is σ = 79944444452. Its totient is φ = 79944444450.

The previous prime is 79944444413. The next prime is 79944444533. The reversal of 79944444451 is 15444444997.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79944444451 is a prime.

It is a super-2 number, since 2×79944444451² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 79944444392 and 79944444401.

It is not a weakly prime, because it can be changed into another prime (79944444551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39972222225 + 39972222226.

It is an arithmetic number, because the mean of its divisors is an integer number (39972222226).

Almost surely, 2^79944444451 is an apocalyptic number.

79944444451 is a deficient number, since it is larger than the sum of its proper divisors (1).

79944444451 is an equidigital number, since it uses as much as digits as its factorization.

79944444451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11612160, while the sum is 55.

The spelling of 79944444451 in words is "seventy-nine billion, nine hundred forty-four million, four hundred forty-four thousand, four hundred fifty-one".