8542561272 has 64 divisors (see below), whose sum is σ = 25691923200. Its totient is φ = 2312271360.

The previous prime is 8542561267. The next prime is 8542561277. The reversal of 8542561272 is 2721652458.

It is an interprime number because it is at equal distance from previous prime (8542561267) and next prime (8542561277).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8542561277) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1334929 + ... + 1341312.

It is an arithmetic number, because the mean of its divisors is an integer number (401436300).

Almost surely, 2^8542561272 is an apocalyptic number.

It is an amenable number.

8542561272 is an abundant number, since it is smaller than the sum of its proper divisors (17149361928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8542561272 is a wasteful number, since it uses less digits than its factorization.

8542561272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2676276 (or 2676272 counting only the distinct ones).

The product of its digits is 268800, while the sum is 42.

The square root of 8542561272 is about 92425.9772574789. The cubic root of 8542561272 is about 2044.2281643984.

The spelling of 8542561272 in words is "eight billion, five hundred forty-two million, five hundred sixty-one thousand, two hundred seventy-two".