51612256137 has 16 divisors (see below), whose sum is σ = 74843673408. Its totient is φ = 31446916800.

The previous prime is 51612256121. The next prime is 51612256147. The reversal of 51612256137 is 73165221615.

It is not a de Polignac number, because 51612256137 - 2⁴ = 51612256121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 51612256095 and 51612256104.

It is not an unprimeable number, because it can be changed into a prime (51612256147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6547503 + ... + 6555380.

It is an arithmetic number, because the mean of its divisors is an integer number (4677729588).

Almost surely, 2^51612256137 is an apocalyptic number.

It is an amenable number.

51612256137 is a deficient number, since it is larger than the sum of its proper divisors (23231417271).

51612256137 is a wasteful number, since it uses less digits than its factorization.

51612256137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13103000.

The product of its digits is 75600, while the sum is 39.

The spelling of 51612256137 in words is "fifty-one billion, six hundred twelve million, two hundred fifty-six thousand, one hundred thirty-seven".