51086449136953 has 4 divisors (see below), whose sum is σ = 51086706605968. Its totient is φ = 51086191667940.

The previous prime is 51086449136851. The next prime is 51086449137023. The reversal of 51086449136953 is 35963194468015.

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-51086449136953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51086441136953) 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, 128436651 + ... + 128833792.

It is an arithmetic number, because the mean of its divisors is an integer number (12771676651492).

Almost surely, 2^{51086449136953} is an apocalyptic number.

It is an amenable number.

51086449136953 is a deficient number, since it is larger than the sum of its proper divisors (257469015).

51086449136953 is a wasteful number, since it uses less digits than its factorization.

51086449136953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257469014.

The product of its (nonzero) digits is 83980800, while the sum is 64.

The spelling of 51086449136953 in words is "fifty-one trillion, eighty-six billion, four hundred forty-nine million, one hundred thirty-six thousand, nine hundred fifty-three".