51546243187 has 2 divisors, whose sum is σ = 51546243188. Its totient is φ = 51546243186.

The previous prime is 51546243131. The next prime is 51546243247. The reversal of 51546243187 is 78134264515.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51546243187 is a prime.

It is not a weakly prime, because it can be changed into another prime (51546243127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25773121593 + 25773121594.

It is an arithmetic number, because the mean of its divisors is an integer number (25773121594).

Almost surely, 2^51546243187 is an apocalyptic number.

51546243187 is a deficient number, since it is larger than the sum of its proper divisors (1).

51546243187 is an equidigital number, since it uses as much as digits as its factorization.

51546243187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 806400, while the sum is 46.

The spelling of 51546243187 in words is "fifty-one billion, five hundred forty-six million, two hundred forty-three thousand, one hundred eighty-seven".