61479398399 has 2 divisors, whose sum is σ = 61479398400. Its totient is φ = 61479398398.

The previous prime is 61479398381. The next prime is 61479398401. The reversal of 61479398399 is 99389397416.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61479398399 is a prime.

Together with 61479398401, 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 (61479394399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30739699199 + 30739699200.

It is an arithmetic number, because the mean of its divisors is an integer number (30739699200).

Almost surely, 2^61479398399 is an apocalyptic number.

61479398399 is a deficient number, since it is larger than the sum of its proper divisors (1).

61479398399 is an equidigital number, since it uses as much as digits as its factorization.

61479398399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79361856, while the sum is 68.

The spelling of 61479398399 in words is "sixty-one billion, four hundred seventy-nine million, three hundred ninety-eight thousand, three hundred ninety-nine".