61464404879 has 2 divisors, whose sum is σ = 61464404880. Its totient is φ = 61464404878.

The previous prime is 61464404851. The next prime is 61464404951. The reversal of 61464404879 is 97840446416.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61464404879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61464404879.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61464404819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30732202439 + 30732202440.

It is an arithmetic number, because the mean of its divisors is an integer number (30732202440).

Almost surely, 2^61464404879 is an apocalyptic number.

61464404879 is a deficient number, since it is larger than the sum of its proper divisors (1).

61464404879 is an equidigital number, since it uses as much as digits as its factorization.

61464404879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4644864, while the sum is 53.

The spelling of 61464404879 in words is "sixty-one billion, four hundred sixty-four million, four hundred four thousand, eight hundred seventy-nine".