51448603165 has 4 divisors (see below), whose sum is σ = 61738323804. Its totient is φ = 41158882528.

The previous prime is 51448603159. The next prime is 51448603201. The reversal of 51448603165 is 56130684415.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14690894436 + 36757708729 = 121206^2 + 191723^2 .

It is a cyclic number.

It is not a de Polignac number, because 51448603165 - 2²⁵ = 51415048733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5144860312 + ... + 5144860321.

It is an arithmetic number, because the mean of its divisors is an integer number (15434580951).

Almost surely, 2^51448603165 is an apocalyptic number.

It is an amenable number.

51448603165 is a deficient number, since it is larger than the sum of its proper divisors (10289720639).

51448603165 is a wasteful number, since it uses less digits than its factorization.

51448603165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10289720638.

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 51448603165 in words is "fifty-one billion, four hundred forty-eight million, six hundred three thousand, one hundred sixty-five".