5015610661 has 4 divisors (see below), whose sum is σ = 5016894400. Its totient is φ = 5014326924.

The previous prime is 5015610629. The next prime is 5015610673. The reversal of 5015610661 is 1660165105.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5015610661 - 2⁵ = 5015610629 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 (5015610361) 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, 635991 + ... + 643828.

It is an arithmetic number, because the mean of its divisors is an integer number (1254223600).

Almost surely, 2^5015610661 is an apocalyptic number.

It is an amenable number.

5015610661 is a deficient number, since it is larger than the sum of its proper divisors (1283739).

5015610661 is a wasteful number, since it uses less digits than its factorization.

5015610661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283738.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 5015610661 is about 70820.9761370175. The cubic root of 5015610661 is about 1711.7536881651.

Adding to 5015610661 its reverse (1660165105), we get a palindrome (6675775766).

The spelling of 5015610661 in words is "five billion, fifteen million, six hundred ten thousand, six hundred sixty-one".