51150661249 has 2 divisors, whose sum is σ = 51150661250. Its totient is φ = 51150661248.

The previous prime is 51150661213. The next prime is 51150661271. The reversal of 51150661249 is 94216605115.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28538020624 + 22612640625 = 168932^2 + 150375^2 .

It is a cyclic number.

It is not a de Polignac number, because 51150661249 - 2¹¹ = 51150659201 is a prime.

It is not a weakly prime, because it can be changed into another prime (51150661949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25575330624 + 25575330625.

It is an arithmetic number, because the mean of its divisors is an integer number (25575330625).

Almost surely, 2^51150661249 is an apocalyptic number.

It is an amenable number.

51150661249 is a deficient number, since it is larger than the sum of its proper divisors (1).

51150661249 is an equidigital number, since it uses as much as digits as its factorization.

51150661249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 51150661249 in words is "fifty-one billion, one hundred fifty million, six hundred sixty-one thousand, two hundred forty-nine".