49999999957 has 2 divisors, whose sum is σ = 49999999958. Its totient is φ = 49999999956.

The previous prime is 49999999867. The next prime is 49999999961. The reversal of 49999999957 is 75999999994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46985331121 + 3014668836 = 216761^2 + 54906^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49999999957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49999999967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24999999978 + 24999999979.

It is an arithmetic number, because the mean of its divisors is an integer number (24999999979).

Almost surely, 2^49999999957 is an apocalyptic number.

It is an amenable number.

49999999957 is a deficient number, since it is larger than the sum of its proper divisors (1).

49999999957 is an equidigital number, since it uses as much as digits as its factorization.

49999999957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6026540940, while the sum is 88.

The spelling of 49999999957 in words is "forty-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred fifty-seven".