51129624874 has 4 divisors (see below), whose sum is σ = 76694437314. Its totient is φ = 25564812436.

The previous prime is 51129624823. The next prime is 51129624911. The reversal of 51129624874 is 47842692115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47842692115 = 5 ⋅9568538423.

It can be written as a sum of positive squares in only one way, i.e., 43594516849 + 7535108025 = 208793^2 + 86805^2 .

It is a super-2 number, since 2×51129624874² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12782406217 + ... + 12782406220.

Almost surely, 2^51129624874 is an apocalyptic number.

51129624874 is a deficient number, since it is larger than the sum of its proper divisors (25564812440).

51129624874 is a wasteful number, since it uses less digits than its factorization.

51129624874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25564812439.

The product of its digits is 967680, while the sum is 49.

The spelling of 51129624874 in words is "fifty-one billion, one hundred twenty-nine million, six hundred twenty-four thousand, eight hundred seventy-four".