1573728896857 has 8 divisors (see below), whose sum is σ = 1695055052936. Its totient is φ = 1452441324672.

The previous prime is 1573728896837. The next prime is 1573728896899. The reversal of 1573728896857 is 7586988273751.

It can be written as a sum of positive squares in 4 ways, for example, as 364144661136 + 1209584235721 = 603444^2 + 1099811^2 .

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

It is not a de Polignac number, because 1573728896857 - 2³¹ = 1571581413209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1573728896827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9561228 + ... + 9724429.

It is an arithmetic number, because the mean of its divisors is an integer number (211881881617).

Almost surely, 2^{1573728896857} is an apocalyptic number.

It is an amenable number.

1573728896857 is a deficient number, since it is larger than the sum of its proper divisors (121326156079).

1573728896857 is a wasteful number, since it uses less digits than its factorization.

1573728896857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19291947.

The product of its digits is 1422489600, while the sum is 76.

The spelling of 1573728896857 in words is "one trillion, five hundred seventy-three billion, seven hundred twenty-eight million, eight hundred ninety-six thousand, eight hundred fifty-seven".