51423319647 has 36 divisors (see below), whose sum is σ = 86443844760. Its totient is φ = 29371601952.

The previous prime is 51423319631. The next prime is 51423319691. The reversal of 51423319647 is 74691332415.

51423319647 is a `hidden beast` number, since 514 + 2 + 3 + 3 + 1 + 96 + 47 = 666.

It is not a de Polignac number, because 51423319647 - 2⁴ = 51423319631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51423319447) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1006573 + ... + 1056425.

It is an arithmetic number, because the mean of its divisors is an integer number (2401217910).

Almost surely, 2^51423319647 is an apocalyptic number.

51423319647 is a deficient number, since it is larger than the sum of its proper divisors (35020525113).

51423319647 is a wasteful number, since it uses less digits than its factorization.

51423319647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52212 (or 52202 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The spelling of 51423319647 in words is "fifty-one billion, four hundred twenty-three million, three hundred nineteen thousand, six hundred forty-seven".