5042556621 has 6 divisors (see below), whose sum is σ = 7283692910. Its totient is φ = 3361704408.

The previous prime is 5042556611. The next prime is 5042556641. The reversal of 5042556621 is 1266552405.

5042556621 is a `hidden beast` number, since 5 + 0 + 4 + 25 + 5 + 6 + 621 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4783797225 + 258759396 = 69165^2 + 16086^2 .

It is not a de Polignac number, because 5042556621 - 2⁹ = 5042556109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5042556611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 280142026 + ... + 280142043.

Almost surely, 2^5042556621 is an apocalyptic number.

It is an amenable number.

5042556621 is a deficient number, since it is larger than the sum of its proper divisors (2241136289).

5042556621 is a wasteful number, since it uses less digits than its factorization.

5042556621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560284075 (or 560284072 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 5042556621 is about 71010.9612735949. The cubic root of 5042556621 is about 1714.8136340367.

The spelling of 5042556621 in words is "five billion, forty-two million, five hundred fifty-six thousand, six hundred twenty-one".