1256541314645 has 32 divisors (see below), whose sum is σ = 1604288747520. Its totient is φ = 943381152000.

The previous prime is 1256541314597. The next prime is 1256541314681. The reversal of 1256541314645 is 5464131456521.

It is not a de Polignac number, because 1256541314645 - 2¹⁴ = 1256541298261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1256541314645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 264590 + ... + 1607199.

It is an arithmetic number, because the mean of its divisors is an integer number (50134023360).

Almost surely, 2^{1256541314645} is an apocalyptic number.

It is an amenable number.

1256541314645 is a deficient number, since it is larger than the sum of its proper divisors (347747432875).

1256541314645 is a wasteful number, since it uses less digits than its factorization.

1256541314645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1871957.

The product of its digits is 1728000, while the sum is 47.

The spelling of 1256541314645 in words is "one trillion, two hundred fifty-six billion, five hundred forty-one million, three hundred fourteen thousand, six hundred forty-five".