8541155972 has 6 divisors (see below), whose sum is σ = 14947022958. Its totient is φ = 4270577984.

The previous prime is 8541155971. The next prime is 8541155989. The reversal of 8541155972 is 2795511458.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8184097156 + 357058816 = 90466^2 + 18896^2 .

It is not an unprimeable number, because it can be changed into a prime (8541155971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1067644493 + ... + 1067644500.

It is an arithmetic number, because the mean of its divisors is an integer number (2491170493).

Almost surely, 2^8541155972 is an apocalyptic number.

It is an amenable number.

8541155972 is a deficient number, since it is larger than the sum of its proper divisors (6405866986).

8541155972 is a wasteful number, since it uses less digits than its factorization.

8541155972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135288997 (or 2135288995 counting only the distinct ones).

The product of its digits is 504000, while the sum is 47.

The square root of 8541155972 is about 92418.3746448724. The cubic root of 8541155972 is about 2044.1160625244.

The spelling of 8541155972 in words is "eight billion, five hundred forty-one million, one hundred fifty-five thousand, nine hundred seventy-two".