51573148947 has 6 divisors (see below), whose sum is σ = 74494548492. Its totient is φ = 34382099292.

The previous prime is 51573148943. The next prime is 51573148961. The reversal of 51573148947 is 74984137515.

51573148947 is a `hidden beast` number, since 5 + 157 + 3 + 1 + 489 + 4 + 7 = 666.

It is not a de Polignac number, because 51573148947 - 2² = 51573148943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51573148893 and 51573148902.

It is not an unprimeable number, because it can be changed into a prime (51573148943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2865174933 + ... + 2865174950.

It is an arithmetic number, because the mean of its divisors is an integer number (12415758082).

Almost surely, 2^51573148947 is an apocalyptic number.

51573148947 is a deficient number, since it is larger than the sum of its proper divisors (22921399545).

51573148947 is a wasteful number, since it uses less digits than its factorization.

51573148947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5730349889 (or 5730349886 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 54.

The spelling of 51573148947 in words is "fifty-one billion, five hundred seventy-three million, one hundred forty-eight thousand, nine hundred forty-seven".