253555163971 has 2 divisors, whose sum is σ = 253555163972. Its totient is φ = 253555163970.

The previous prime is 253555163959. The next prime is 253555164001. The reversal of 253555163971 is 179361555352.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253555163971 is a prime.

It is not a weakly prime, because it can be changed into another prime (253553163971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126777581985 + 126777581986.

It is an arithmetic number, because the mean of its divisors is an integer number (126777581986).

Almost surely, 2^253555163971 is an apocalyptic number.

253555163971 is a deficient number, since it is larger than the sum of its proper divisors (1).

253555163971 is an equidigital number, since it uses as much as digits as its factorization.

253555163971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4252500, while the sum is 52.

The spelling of 253555163971 in words is "two hundred fifty-three billion, five hundred fifty-five million, one hundred sixty-three thousand, nine hundred seventy-one".