51545421423 has 24 divisors (see below), whose sum is σ = 78664575600. Its totient is φ = 32433951744.

The previous prime is 51545421391. The next prime is 51545421437. The reversal of 51545421423 is 32412454515.

51545421423 is a `hidden beast` number, since 51 + 54 + 542 + 14 + 2 + 3 = 666.

It is not a de Polignac number, because 51545421423 - 2⁵ = 51545421391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51545421493) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 514290 + ... + 606287.

It is an arithmetic number, because the mean of its divisors is an integer number (3277690650).

Almost surely, 2^51545421423 is an apocalyptic number.

51545421423 is a deficient number, since it is larger than the sum of its proper divisors (27119154177).

51545421423 is a wasteful number, since it uses less digits than its factorization.

51545421423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120871 (or 1120868 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

Adding to 51545421423 its reverse (32412454515), we get a palindrome (83957875938).

The spelling of 51545421423 in words is "fifty-one billion, five hundred forty-five million, four hundred twenty-one thousand, four hundred twenty-three".