256148511725 has 6 divisors (see below), whose sum is σ = 317624154570. Its totient is φ = 204918809360.

The previous prime is 256148511709. The next prime is 256148511733. The reversal of 256148511725 is 527115841652.

It can be written as a sum of positive squares in 3 ways, for example, as 24107841289 + 232040670436 = 155267^2 + 481706^2 .

It is not a de Polignac number, because 256148511725 - 2⁴ = 256148511709 is a prime.

It is a super-2 number, since 2×256148511725² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 256148511725.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5122970210 + ... + 5122970259.

It is an arithmetic number, because the mean of its divisors is an integer number (52937359095).

Almost surely, 2^256148511725 is an apocalyptic number.

256148511725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256148511725 is a deficient number, since it is larger than the sum of its proper divisors (61475642845).

256148511725 is a wasteful number, since it uses less digits than its factorization.

256148511725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10245940479 (or 10245940474 counting only the distinct ones).

The product of its digits is 672000, while the sum is 47.

The spelling of 256148511725 in words is "two hundred fifty-six billion, one hundred forty-eight million, five hundred eleven thousand, seven hundred twenty-five".