245437424681 has 2 divisors, whose sum is σ = 245437424682. Its totient is φ = 245437424680.

The previous prime is 245437424653. The next prime is 245437424689. The reversal of 245437424681 is 186424734542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 241390429225 + 4046995456 = 491315^2 + 63616^2 .

It is a cyclic number.

It is not a de Polignac number, because 245437424681 - 2¹⁴ = 245437408297 is a prime.

It is a super-2 number, since 2×245437424681² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (245437424689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122718712340 + 122718712341.

It is an arithmetic number, because the mean of its divisors is an integer number (122718712341).

Almost surely, 2^245437424681 is an apocalyptic number.

It is an amenable number.

245437424681 is a deficient number, since it is larger than the sum of its proper divisors (1).

245437424681 is an equidigital number, since it uses as much as digits as its factorization.

245437424681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5160960, while the sum is 50.

The spelling of 245437424681 in words is "two hundred forty-five billion, four hundred thirty-seven million, four hundred twenty-four thousand, six hundred eighty-one".