50554408921 has 2 divisors, whose sum is σ = 50554408922. Its totient is φ = 50554408920.

The previous prime is 50554408913. The next prime is 50554409029. The reversal of 50554408921 is 12980445505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28514037321 + 22040371600 = 168861^2 + 148460^2 .

It is a cyclic number.

It is not a de Polignac number, because 50554408921 - 2³ = 50554408913 is a prime.

It is a super-2 number, since 2×50554408921² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (50554400921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25277204460 + 25277204461.

It is an arithmetic number, because the mean of its divisors is an integer number (25277204461).

Almost surely, 2^50554408921 is an apocalyptic number.

It is an amenable number.

50554408921 is a deficient number, since it is larger than the sum of its proper divisors (1).

50554408921 is an equidigital number, since it uses as much as digits as its factorization.

50554408921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288000, while the sum is 43.

The spelling of 50554408921 in words is "fifty billion, five hundred fifty-four million, four hundred eight thousand, nine hundred twenty-one".