51964388249 has 2 divisors, whose sum is σ = 51964388250. Its totient is φ = 51964388248.

The previous prime is 51964388239. The next prime is 51964388297. The reversal of 51964388249 is 94288346915.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37249000000 + 14715388249 = 193000^2 + 121307^2 .

It is a cyclic number.

It is not a de Polignac number, because 51964388249 - 2²⁸ = 51695952793 is a prime.

It is a super-3 number, since 3×51964388249³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (51964388239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25982194124 + 25982194125.

It is an arithmetic number, because the mean of its divisors is an integer number (25982194125).

Almost surely, 2^51964388249 is an apocalyptic number.

It is an amenable number.

51964388249 is a deficient number, since it is larger than the sum of its proper divisors (1).

51964388249 is an equidigital number, since it uses as much as digits as its factorization.

51964388249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14929920, while the sum is 59.

The spelling of 51964388249 in words is "fifty-one billion, nine hundred sixty-four million, three hundred eighty-eight thousand, two hundred forty-nine".