61312245479 has 2 divisors, whose sum is σ = 61312245480. Its totient is φ = 61312245478.

The previous prime is 61312245437. The next prime is 61312245481. The reversal of 61312245479 is 97454221316.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61312245479 - 2¹² = 61312241383 is a prime.

It is a Sophie Germain prime.

Together with 61312245481, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61312245409) 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, 30656122739 + 30656122740.

It is an arithmetic number, because the mean of its divisors is an integer number (30656122740).

Almost surely, 2^61312245479 is an apocalyptic number.

61312245479 is a deficient number, since it is larger than the sum of its proper divisors (1).

61312245479 is an equidigital number, since it uses as much as digits as its factorization.

61312245479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 44.

The spelling of 61312245479 in words is "sixty-one billion, three hundred twelve million, two hundred forty-five thousand, four hundred seventy-nine".