207744134399957 has 2 divisors, whose sum is σ = 207744134399958. Its totient is φ = 207744134399956.

The previous prime is 207744134399927. The next prime is 207744134400067. The reversal of 207744134399957 is 759993431447702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194211845152081 + 13532289247876 = 13935991^2 + 3678626^2 .

It is a cyclic number.

It is not a de Polignac number, because 207744134399957 - 2²⁸ = 207743865964501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (207744134399927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103872067199978 + 103872067199979.

It is an arithmetic number, because the mean of its divisors is an integer number (103872067199979).

Almost surely, 2^{207744134399957} is an apocalyptic number.

It is an amenable number.

207744134399957 is a deficient number, since it is larger than the sum of its proper divisors (1).

207744134399957 is an equidigital number, since it uses as much as digits as its factorization.

207744134399957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440270720, while the sum is 74.

The spelling of 207744134399957 in words is "two hundred seven trillion, seven hundred forty-four billion, one hundred thirty-four million, three hundred ninety-nine thousand, nine hundred fifty-seven".