8061549509 has 8 divisors (see below), whose sum is σ = 8682438912. Its totient is φ = 7440770160.

The previous prime is 8061549467. The next prime is 8061549523. The reversal of 8061549509 is 9059451608.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8061549509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8061549589) 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, 186104 + ... + 225294.

It is an arithmetic number, because the mean of its divisors is an integer number (1085304864).

Almost surely, 2^8061549509 is an apocalyptic number.

It is an amenable number.

8061549509 is a deficient number, since it is larger than the sum of its proper divisors (620889403).

8061549509 is a wasteful number, since it uses less digits than its factorization.

8061549509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55027.

The product of its (nonzero) digits is 388800, while the sum is 47.

The square root of 8061549509 is about 89786.1320527842. The cubic root of 8061549509 is about 2005.1160277214.

The spelling of 8061549509 in words is "eight billion, sixty-one million, five hundred forty-nine thousand, five hundred nine".