5001561655 has 4 divisors (see below), whose sum is σ = 6001873992. Its totient is φ = 4001249320.

The previous prime is 5001561563. The next prime is 5001561661. The reversal of 5001561655 is 5561651005.

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

It is not a de Polignac number, because 5001561655 - 2⁷ = 5001561527 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5001561655.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500156161 + ... + 500156170.

It is an arithmetic number, because the mean of its divisors is an integer number (1500468498).

Almost surely, 2^5001561655 is an apocalyptic number.

5001561655 is a deficient number, since it is larger than the sum of its proper divisors (1000312337).

5001561655 is a wasteful number, since it uses less digits than its factorization.

5001561655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000312336.

The product of its (nonzero) digits is 22500, while the sum is 34.

The square root of 5001561655 is about 70721.7198249590. The cubic root of 5001561655 is about 1710.1539543113.

The spelling of 5001561655 in words is "five billion, one million, five hundred sixty-one thousand, six hundred fifty-five".