251420134426633 has 2 divisors, whose sum is σ = 251420134426634. Its totient is φ = 251420134426632.

The previous prime is 251420134426613. The next prime is 251420134426709. The reversal of 251420134426633 is 336624431024152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 224082577094544 + 27337557332089 = 14969388^2 + 5228533^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251420134426633 is a prime.

It is not a weakly prime, because it can be changed into another prime (251420134426613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125710067213316 + 125710067213317.

It is an arithmetic number, because the mean of its divisors is an integer number (125710067213317).

Almost surely, 2^{251420134426633} is an apocalyptic number.

It is an amenable number.

251420134426633 is a deficient number, since it is larger than the sum of its proper divisors (1).

251420134426633 is an equidigital number, since it uses as much as digits as its factorization.

251420134426633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2488320, while the sum is 46.

The spelling of 251420134426633 in words is "two hundred fifty-one trillion, four hundred twenty billion, one hundred thirty-four million, four hundred twenty-six thousand, six hundred thirty-three".