49999599961 has 2 divisors, whose sum is σ = 49999599962. Its totient is φ = 49999599960.

The previous prime is 49999599931. The next prime is 49999600037. The reversal of 49999599961 is 16999599994.

49999599961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45422265625 + 4577334336 = 213125^2 + 67656^2 .

It is a cyclic number.

It is not a de Polignac number, because 49999599961 - 2⁹ = 49999599449 is a prime.

It is not a weakly prime, because it can be changed into another prime (49999599931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24999799980 + 24999799981.

It is an arithmetic number, because the mean of its divisors is an integer number (24999799981).

Almost surely, 2^49999599961 is an apocalyptic number.

It is an amenable number.

49999599961 is a deficient number, since it is larger than the sum of its proper divisors (1).

49999599961 is an equidigital number, since it uses as much as digits as its factorization.

49999599961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 573956280, while the sum is 79.

The spelling of 49999599961 in words is "forty-nine billion, nine hundred ninety-nine million, five hundred ninety-nine thousand, nine hundred sixty-one".