251654251325563 has 2 divisors, whose sum is σ = 251654251325564. Its totient is φ = 251654251325562.

The previous prime is 251654251325509. The next prime is 251654251325573. The reversal of 251654251325563 is 365523152456152.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251654251325563 is a prime.

It is not a weakly prime, because it can be changed into another prime (251654251325573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125827125662781 + 125827125662782.

It is an arithmetic number, because the mean of its divisors is an integer number (125827125662782).

Almost surely, 2^{251654251325563} is an apocalyptic number.

251654251325563 is a deficient number, since it is larger than the sum of its proper divisors (1).

251654251325563 is an equidigital number, since it uses as much as digits as its factorization.

251654251325563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400000, while the sum is 55.

The spelling of 251654251325563 in words is "two hundred fifty-one trillion, six hundred fifty-four billion, two hundred fifty-one million, three hundred twenty-five thousand, five hundred sixty-three".