8157552836449 has 27 divisors (see below), whose sum is σ = 8470406454993. Its totient is φ = 7856152634088.

The previous prime is 8157552836333. The next prime is 8157552836497. The reversal of 8157552836449 is 9446382557518.

The square root of 8157552836449 is 2856143.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 8157552836449 - 2³⁹ = 7607797022561 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8157552836549) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 8993993854 + ... + 8993994760.

Almost surely, 2^{8157552836449} is an apocalyptic number.

8157552836449 is the 2856143-rd square number.

8157552836449 is the 1428072-nd centered octagonal number.

It is an amenable number.

8157552836449 is a deficient number, since it is larger than the sum of its proper divisors (312853618544).

8157552836449 is an frugal number, since it uses more digits than its factorization.

8157552836449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2042 (or 1021 counting only the distinct ones).

The product of its digits is 290304000, while the sum is 67.

It can be divided in two parts, 8157552 and 836449, that added together give a square (8994001 = 2999²).

The spelling of 8157552836449 in words is "eight trillion, one hundred fifty-seven billion, five hundred fifty-two million, eight hundred thirty-six thousand, four hundred forty-nine".