79465056421 has 2 divisors, whose sum is σ = 79465056422. Its totient is φ = 79465056420.

The previous prime is 79465056389. The next prime is 79465056439. The reversal of 79465056421 is 12465056497.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79461408321 + 3648100 = 281889^2 + 1910^2 .

It is an emirp because it is prime and its reverse (12465056497) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79465056421 - 2⁵ = 79465056389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79465056481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39732528210 + 39732528211.

It is an arithmetic number, because the mean of its divisors is an integer number (39732528211).

Almost surely, 2^79465056421 is an apocalyptic number.

It is an amenable number.

79465056421 is a deficient number, since it is larger than the sum of its proper divisors (1).

79465056421 is an equidigital number, since it uses as much as digits as its factorization.

79465056421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1814400, while the sum is 49.

The spelling of 79465056421 in words is "seventy-nine billion, four hundred sixty-five million, fifty-six thousand, four hundred twenty-one".