5251514372661 has 4 divisors (see below), whose sum is σ = 7002019163552. Its totient is φ = 3501009581772.

The previous prime is 5251514372651. The next prime is 5251514372717. The reversal of 5251514372661 is 1662734151525.

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 not a de Polignac number, because 5251514372661 - 2¹⁰ = 5251514371637 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 5251514372661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5251514372651) 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, 875252395441 + ... + 875252395446.

It is an arithmetic number, because the mean of its divisors is an integer number (1750504790888).

Almost surely, 2^{5251514372661} is an apocalyptic number.

It is an amenable number.

5251514372661 is a deficient number, since it is larger than the sum of its proper divisors (1750504790891).

5251514372661 is a wasteful number, since it uses less digits than its factorization.

5251514372661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750504790890.

The product of its digits is 1512000, while the sum is 48.

The spelling of 5251514372661 in words is "five trillion, two hundred fifty-one billion, five hundred fourteen million, three hundred seventy-two thousand, six hundred sixty-one".