51960504649 has 2 divisors, whose sum is σ = 51960504650. Its totient is φ = 51960504648.

The previous prime is 51960504623. The next prime is 51960504677. The reversal of 51960504649 is 94640506915.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38948996025 + 13011508624 = 197355^2 + 114068^2 .

It is a cyclic number.

It is not a de Polignac number, because 51960504649 - 2²¹ = 51958407497 is a prime.

It is a super-2 number, since 2×51960504649² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51960507649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25980252324 + 25980252325.

It is an arithmetic number, because the mean of its divisors is an integer number (25980252325).

Almost surely, 2^51960504649 is an apocalyptic number.

It is an amenable number.

51960504649 is a deficient number, since it is larger than the sum of its proper divisors (1).

51960504649 is an equidigital number, since it uses as much as digits as its factorization.

51960504649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1166400, while the sum is 49.

The spelling of 51960504649 in words is "fifty-one billion, nine hundred sixty million, five hundred four thousand, six hundred forty-nine".