51531964148363 has 2 divisors, whose sum is σ = 51531964148364. Its totient is φ = 51531964148362.

The previous prime is 51531964148317. The next prime is 51531964148377. The reversal of 51531964148363 is 36384146913515.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51531964148363 - 2³² = 51527669181067 is a prime.

It is not a weakly prime, because it can be changed into another prime (51531964148963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25765982074181 + 25765982074182.

It is an arithmetic number, because the mean of its divisors is an integer number (25765982074182).

Almost surely, 2^{51531964148363} is an apocalyptic number.

51531964148363 is a deficient number, since it is larger than the sum of its proper divisors (1).

51531964148363 is an equidigital number, since it uses as much as digits as its factorization.

51531964148363 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27993600, while the sum is 59.

The spelling of 51531964148363 in words is "fifty-one trillion, five hundred thirty-one billion, nine hundred sixty-four million, one hundred forty-eight thousand, three hundred sixty-three".