51507105653 has 2 divisors, whose sum is σ = 51507105654. Its totient is φ = 51507105652.

The previous prime is 51507105613. The next prime is 51507105667. The reversal of 51507105653 is 35650170515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32264422129 + 19242683524 = 179623^2 + 138718^2 .

It is a cyclic number.

It is not a de Polignac number, because 51507105653 - 2⁶ = 51507105589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51507105613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25753552826 + 25753552827.

It is an arithmetic number, because the mean of its divisors is an integer number (25753552827).

Almost surely, 2^51507105653 is an apocalyptic number.

It is an amenable number.

51507105653 is a deficient number, since it is larger than the sum of its proper divisors (1).

51507105653 is an equidigital number, since it uses as much as digits as its factorization.

51507105653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78750, while the sum is 38.

The spelling of 51507105653 in words is "fifty-one billion, five hundred seven million, one hundred five thousand, six hundred fifty-three".