49559887021 has 2 divisors, whose sum is σ = 49559887022. Its totient is φ = 49559887020.

The previous prime is 49559886989. The next prime is 49559887049. The reversal of 49559887021 is 12078895594.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27837254025 + 21722632996 = 166845^2 + 147386^2 .

It is a cyclic number.

It is not a de Polignac number, because 49559887021 - 2⁵ = 49559886989 is a prime.

It is the 222621-st Hogben number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49559887061) by changing a digit.

It is a nontrivial repunit in base 222620.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24779943510 + 24779943511.

It is an arithmetic number, because the mean of its divisors is an integer number (24779943511).

Almost surely, 2^49559887021 is an apocalyptic number.

It is an amenable number.

49559887021 is a deficient number, since it is larger than the sum of its proper divisors (1).

49559887021 is an equidigital number, since it uses as much as digits as its factorization.

49559887021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7257600, while the sum is 58.

The spelling of 49559887021 in words is "forty-nine billion, five hundred fifty-nine million, eight hundred eighty-seven thousand, twenty-one".