8012561489 has 8 divisors (see below), whose sum is σ = 8209222560. Its totient is φ = 7815959200.

The previous prime is 8012561441. The next prime is 8012561527. The reversal of 8012561489 is 9841652108.

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

It is a cyclic number.

It is not a de Polignac number, because 8012561489 - 2²⁴ = 7995784273 is a prime.

It is a super-2 number, since 2×8012561489² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8012561429) 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, 409082 + ... + 428220.

It is an arithmetic number, because the mean of its divisors is an integer number (1026152820).

Almost surely, 2^8012561489 is an apocalyptic number.

It is an amenable number.

8012561489 is a deficient number, since it is larger than the sum of its proper divisors (196661071).

8012561489 is a wasteful number, since it uses less digits than its factorization.

8012561489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29391.

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 8012561489 is about 89512.9124149136. The cubic root of 8012561489 is about 2001.0462433420.

The spelling of 8012561489 in words is "eight billion, twelve million, five hundred sixty-one thousand, four hundred eighty-nine".