51011236123877 has 2 divisors, whose sum is σ = 51011236123878. Its totient is φ = 51011236123876.

The previous prime is 51011236123849. The next prime is 51011236123919. The reversal of 51011236123877 is 77832163211015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49137099765796 + 1874136358081 = 7009786^2 + 1368991^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51011236123877 is a prime.

It is a super-2 number, since 2×51011236123877² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51011236143877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25505618061938 + 25505618061939.

It is an arithmetic number, because the mean of its divisors is an integer number (25505618061939).

Almost surely, 2^{51011236123877} is an apocalyptic number.

It is an amenable number.

51011236123877 is a deficient number, since it is larger than the sum of its proper divisors (1).

51011236123877 is an equidigital number, since it uses as much as digits as its factorization.

51011236123877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 47.

The spelling of 51011236123877 in words is "fifty-one trillion, eleven billion, two hundred thirty-six million, one hundred twenty-three thousand, eight hundred seventy-seven".