1157843756257 has 4 divisors (see below), whose sum is σ = 1157936596740. Its totient is φ = 1157750915776.

The previous prime is 1157843756249. The next prime is 1157843756287. The reversal of 1157843756257 is 7526573487511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 736706355856 + 421137400401 = 858316^2 + 648951^2 .

It is a cyclic number.

It is not a de Polignac number, because 1157843756257 - 2³ = 1157843756249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1157843756195 and 1157843756204.

It is not an unprimeable number, because it can be changed into a prime (1157843756207) 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, 46401532 + ... + 46426477.

It is an arithmetic number, because the mean of its divisors is an integer number (289484149185).

Almost surely, 2^{1157843756257} is an apocalyptic number.

It is an amenable number.

1157843756257 is a deficient number, since it is larger than the sum of its proper divisors (92840483).

1157843756257 is an equidigital number, since it uses as much as digits as its factorization.

1157843756257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92840482.

The product of its digits is 49392000, while the sum is 61.

The spelling of 1157843756257 in words is "one trillion, one hundred fifty-seven billion, eight hundred forty-three million, seven hundred fifty-six thousand, two hundred fifty-seven".