257734620007 has 2 divisors, whose sum is σ = 257734620008. Its totient is φ = 257734620006.

The previous prime is 257734619941. The next prime is 257734620053. The reversal of 257734620007 is 700026437752.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257734620007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257734620107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128867310003 + 128867310004.

It is an arithmetic number, because the mean of its divisors is an integer number (128867310004).

Almost surely, 2^257734620007 is an apocalyptic number.

257734620007 is a deficient number, since it is larger than the sum of its proper divisors (1).

257734620007 is an equidigital number, since it uses as much as digits as its factorization.

257734620007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 493920, while the sum is 43.

The spelling of 257734620007 in words is "two hundred fifty-seven billion, seven hundred thirty-four million, six hundred twenty thousand, seven".