51642955258291 has 2 divisors, whose sum is σ = 51642955258292. Its totient is φ = 51642955258290.

The previous prime is 51642955258091. The next prime is 51642955258303. The reversal of 51642955258291 is 19285255924615.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51642955258291 is a prime.

It is not a weakly prime, because it can be changed into another prime (51642955258091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25821477629145 + 25821477629146.

It is an arithmetic number, because the mean of its divisors is an integer number (25821477629146).

Almost surely, 2^{51642955258291} is an apocalyptic number.

51642955258291 is a deficient number, since it is larger than the sum of its proper divisors (1).

51642955258291 is an equidigital number, since it uses as much as digits as its factorization.

51642955258291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760000, while the sum is 64.

The spelling of 51642955258291 in words is "fifty-one trillion, six hundred forty-two billion, nine hundred fifty-five million, two hundred fifty-eight thousand, two hundred ninety-one".