1157444564545 has 8 divisors (see below), whose sum is σ = 1470635446824. Its totient is φ = 871487672064.

The previous prime is 1157444564539. The next prime is 1157444564569. The reversal of 1157444564545 is 5454654447511.

It can be written as a sum of positive squares in 4 ways, for example, as 28818797121 + 1128625767424 = 169761^2 + 1062368^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1157444564545 - 2⁵ = 1157444564513 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6808497354 + ... + 6808497523.

It is an arithmetic number, because the mean of its divisors is an integer number (183829430853).

Almost surely, 2^{1157444564545} is an apocalyptic number.

It is an amenable number.

1157444564545 is a deficient number, since it is larger than the sum of its proper divisors (313190882279).

1157444564545 is a wasteful number, since it uses less digits than its factorization.

1157444564545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13616994899.

The product of its digits is 26880000, while the sum is 55.

The spelling of 1157444564545 in words is "one trillion, one hundred fifty-seven billion, four hundred forty-four million, five hundred sixty-four thousand, five hundred forty-five".