1257183456481 has 4 divisors (see below), whose sum is σ = 1273097171200. Its totient is φ = 1241269741764.

The previous prime is 1257183456469. The next prime is 1257183456497. The reversal of 1257183456481 is 1846543817521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1257183456481 - 2¹¹ = 1257183454433 is a prime.

It is a super-2 number, since 2×1257183456481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1257183456421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7956857241 + ... + 7956857398.

It is an arithmetic number, because the mean of its divisors is an integer number (318274292800).

Almost surely, 2^{1257183456481} is an apocalyptic number.

It is an amenable number.

1257183456481 is a deficient number, since it is larger than the sum of its proper divisors (15913714719).

1257183456481 is an equidigital number, since it uses as much as digits as its factorization.

1257183456481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15913714718.

The product of its digits is 6451200, while the sum is 55.

The spelling of 1257183456481 in words is "one trillion, two hundred fifty-seven billion, one hundred eighty-three million, four hundred fifty-six thousand, four hundred eighty-one".