51256156387 has 2 divisors, whose sum is σ = 51256156388. Its totient is φ = 51256156386.

The previous prime is 51256156373. The next prime is 51256156421. The reversal of 51256156387 is 78365165215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51256156387 - 2¹⁵ = 51256123619 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51256156387.

It is not a weakly prime, because it can be changed into another prime (51256156327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25628078193 + 25628078194.

It is an arithmetic number, because the mean of its divisors is an integer number (25628078194).

Almost surely, 2^51256156387 is an apocalyptic number.

51256156387 is a deficient number, since it is larger than the sum of its proper divisors (1).

51256156387 is an equidigital number, since it uses as much as digits as its factorization.

51256156387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512000, while the sum is 49.

The spelling of 51256156387 in words is "fifty-one billion, two hundred fifty-six million, one hundred fifty-six thousand, three hundred eighty-seven".