61963557379 has 2 divisors, whose sum is σ = 61963557380. Its totient is φ = 61963557378.

The previous prime is 61963557373. The next prime is 61963557389. The reversal of 61963557379 is 97375536916.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61963557379 - 2³ = 61963557371 is a prime.

It is not a weakly prime, because it can be changed into another prime (61963557371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30981778689 + 30981778690.

It is an arithmetic number, because the mean of its divisors is an integer number (30981778690).

Almost surely, 2^61963557379 is an apocalyptic number.

61963557379 is a deficient number, since it is larger than the sum of its proper divisors (1).

61963557379 is an equidigital number, since it uses as much as digits as its factorization.

61963557379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32148900, while the sum is 61.

The spelling of 61963557379 in words is "sixty-one billion, nine hundred sixty-three million, five hundred fifty-seven thousand, three hundred seventy-nine".