8649391532 has 12 divisors (see below), whose sum is σ = 15362352600. Its totient is φ = 4260147936.

The previous prime is 8649391519. The next prime is 8649391537. The reversal of 8649391532 is 2351939468.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (8649391537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16136657 + ... + 16137192.

It is an arithmetic number, because the mean of its divisors is an integer number (1280196050).

Almost surely, 2^8649391532 is an apocalyptic number.

It is an amenable number.

8649391532 is a deficient number, since it is larger than the sum of its proper divisors (6712961068).

8649391532 is a wasteful number, since it uses less digits than its factorization.

8649391532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32273920 (or 32273918 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 50.

The square root of 8649391532 is about 93002.1049869303. The cubic root of 8649391532 is about 2052.7143526143.

The spelling of 8649391532 in words is "eight billion, six hundred forty-nine million, three hundred ninety-one thousand, five hundred thirty-two".