51440160572861 has 4 divisors (see below), whose sum is σ = 51448012840224. Its totient is φ = 51432308305500.

The previous prime is 51440160572837. The next prime is 51440160572893. The reversal of 51440160572861 is 16827506104415.

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 a de Polignac number, because none of the positive numbers 2^k-51440160572861 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 (51440160572821) 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, 3926123855 + ... + 3926136956.

It is an arithmetic number, because the mean of its divisors is an integer number (12862003210056).

Almost surely, 2^{51440160572861} is an apocalyptic number.

It is an amenable number.

51440160572861 is a deficient number, since it is larger than the sum of its proper divisors (7852267363).

51440160572861 is an equidigital number, since it uses as much as digits as its factorization.

51440160572861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7852267362.

The product of its (nonzero) digits is 1612800, while the sum is 50.

The spelling of 51440160572861 in words is "fifty-one trillion, four hundred forty billion, one hundred sixty million, five hundred seventy-two thousand, eight hundred sixty-one".