50176919981 has 2 divisors, whose sum is σ = 50176919982. Its totient is φ = 50176919980.

The previous prime is 50176919971. The next prime is 50176920007. The reversal of 50176919981 is 18991967105.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36635874025 + 13541045956 = 191405^2 + 116366^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50176919981 is a prime.

It is a super-2 number, since 2×50176919981² (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 (50176919971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25088459990 + 25088459991.

It is an arithmetic number, because the mean of its divisors is an integer number (25088459991).

Almost surely, 2^50176919981 is an apocalyptic number.

It is an amenable number.

50176919981 is a deficient number, since it is larger than the sum of its proper divisors (1).

50176919981 is an equidigital number, since it uses as much as digits as its factorization.

50176919981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1224720, while the sum is 56.

The spelling of 50176919981 in words is "fifty billion, one hundred seventy-six million, nine hundred nineteen thousand, nine hundred eighty-one".