1256770485153 has 24 divisors (see below), whose sum is σ = 1866307029288. Its totient is φ = 814367872512.

The previous prime is 1256770485127. The next prime is 1256770485169. The reversal of 1256770485153 is 3515840776521.

1256770485153 is a `hidden beast` number, since 1 + 2 + 5 + 6 + 7 + 7 + 0 + 485 + 153 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 301348298304 + 955422186849 = 548952^2 + 977457^2 .

It is not a de Polignac number, because 1256770485153 - 2¹³ = 1256770476961 is a prime.

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 1256770485153.

It is not an unprimeable number, because it can be changed into a prime (1256770485953) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1606126 + ... + 2256807.

It is an arithmetic number, because the mean of its divisors is an integer number (77762792887).

Almost surely, 2^{1256770485153} is an apocalyptic number.

It is an amenable number.

1256770485153 is a deficient number, since it is larger than the sum of its proper divisors (609536544135).

1256770485153 is a wasteful number, since it uses less digits than its factorization.

1256770485153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3863953 (or 3863950 counting only the distinct ones).

The product of its (nonzero) digits is 7056000, while the sum is 54.

The spelling of 1256770485153 in words is "one trillion, two hundred fifty-six billion, seven hundred seventy million, four hundred eighty-five thousand, one hundred fifty-three".