257605137777070 has 16 divisors (see below), whose sum is σ = 463737888603360. Its totient is φ = 103031246087584.

The previous prime is 257605137777061. The next prime is 257605137777073. The reversal of 257605137777070 is 70777731506752.

It is a junction number, because it is equal to n+sod(n) for n = 257605137776993 and 257605137777011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257605137777073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1351027810 + ... + 1351218469.

It is an arithmetic number, because the mean of its divisors is an integer number (28983618037710).

Almost surely, 2^{257605137777070} is an apocalyptic number.

257605137777070 is a deficient number, since it is larger than the sum of its proper divisors (206132750826290).

257605137777070 is a wasteful number, since it uses less digits than its factorization.

257605137777070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2702255819.

The product of its (nonzero) digits is 105884100, while the sum is 64.

The spelling of 257605137777070 in words is "two hundred fifty-seven trillion, six hundred five billion, one hundred thirty-seven million, seven hundred seventy-seven thousand, seventy".