50999999957 has 2 divisors, whose sum is σ = 50999999958. Its totient is φ = 50999999956.

The previous prime is 50999999951. The next prime is 51000000041. The reversal of 50999999957 is 75999999905.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45230230276 + 5769769681 = 212674^2 + 75959^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50999999957 is a prime.

It is a super-2 number, since 2×50999999957² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50999999951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25499999978 + 25499999979.

It is an arithmetic number, because the mean of its divisors is an integer number (25499999979).

Almost surely, 2^50999999957 is an apocalyptic number.

It is an amenable number.

50999999957 is a deficient number, since it is larger than the sum of its proper divisors (1).

50999999957 is an equidigital number, since it uses as much as digits as its factorization.

50999999957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 837019575, while the sum is 80.

The spelling of 50999999957 in words is "fifty billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred fifty-seven".