5561254639 has 4 divisors (see below), whose sum is σ = 5561430480. Its totient is φ = 5561078800.

The previous prime is 5561254631. The next prime is 5561254661. The reversal of 5561254639 is 9364521655.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5561254639 - 2³ = 5561254631 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 (5561254631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25894 + ... + 108595.

It is an arithmetic number, because the mean of its divisors is an integer number (1390357620).

Almost surely, 2^5561254639 is an apocalyptic number.

5561254639 is a deficient number, since it is larger than the sum of its proper divisors (175841).

5561254639 is a wasteful number, since it uses less digits than its factorization.

5561254639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175840.

The product of its digits is 972000, while the sum is 46.

The square root of 5561254639 is about 74573.8200644167. The cubic root of 5561254639 is about 1771.7030263201.

The spelling of 5561254639 in words is "five billion, five hundred sixty-one million, two hundred fifty-four thousand, six hundred thirty-nine".