61402682879 has 2 divisors, whose sum is σ = 61402682880. Its totient is φ = 61402682878.

The previous prime is 61402682833. The next prime is 61402682893. The reversal of 61402682879 is 97828620416.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61402682879 - 2²⁴ = 61385905663 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61402682879.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61402684879) 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, 30701341439 + 30701341440.

It is an arithmetic number, because the mean of its divisors is an integer number (30701341440).

Almost surely, 2^61402682879 is an apocalyptic number.

61402682879 is a deficient number, since it is larger than the sum of its proper divisors (1).

61402682879 is an equidigital number, since it uses as much as digits as its factorization.

61402682879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2322432, while the sum is 53.

The spelling of 61402682879 in words is "sixty-one billion, four hundred two million, six hundred eighty-two thousand, eight hundred seventy-nine".