51510616441 has 4 divisors (see below), whose sum is σ = 51511115392. Its totient is φ = 51510117492.

The previous prime is 51510616433. The next prime is 51510616489. The reversal of 51510616441 is 14461601515.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 51510616441 - 2³ = 51510616433 is a prime.

It is a super-2 number, since 2×51510616441² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51510616397 and 51510616406.

It is not an unprimeable number, because it can be changed into a prime (51510610441) 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, 30621 + ... + 322426.

It is an arithmetic number, because the mean of its divisors is an integer number (12877778848).

Almost surely, 2^51510616441 is an apocalyptic number.

It is an amenable number.

51510616441 is a deficient number, since it is larger than the sum of its proper divisors (498951).

51510616441 is a wasteful number, since it uses less digits than its factorization.

51510616441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498950.

The product of its (nonzero) digits is 14400, while the sum is 34.

The spelling of 51510616441 in words is "fifty-one billion, five hundred ten million, six hundred sixteen thousand, four hundred forty-one".