8161545272 has 16 divisors (see below), whose sum is σ = 15423394560. Its totient is φ = 4048640064.

The previous prime is 8161545263. The next prime is 8161545311. The reversal of 8161545272 is 2725451618.

It is a super-2 number, since 2×8161545272² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4015493 + ... + 4017524.

It is an arithmetic number, because the mean of its divisors is an integer number (963962160).

Almost surely, 2^8161545272 is an apocalyptic number.

It is an amenable number.

8161545272 is a deficient number, since it is larger than the sum of its proper divisors (7261849288).

8161545272 is a wasteful number, since it uses less digits than its factorization.

8161545272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8033150 (or 8033146 counting only the distinct ones).

The product of its digits is 134400, while the sum is 41.

The square root of 8161545272 is about 90341.2711444775. The cubic root of 8161545272 is about 2013.3724949134.

The spelling of 8161545272 in words is "eight billion, one hundred sixty-one million, five hundred forty-five thousand, two hundred seventy-two".