1659549642 has 32 divisors (see below), whose sum is σ = 3535902720. Its totient is φ = 517751280.

The previous prime is 1659549631. The next prime is 1659549643. The reversal of 1659549642 is 2469459561.

It is not an unprimeable number, because it can be changed into a prime (1659549643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78234 + ... + 97157.

It is an arithmetic number, because the mean of its divisors is an integer number (110496960).

Almost surely, 2^1659549642 is an apocalyptic number.

1659549642 is an abundant number, since it is smaller than the sum of its proper divisors (1876353078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1659549642 is a wasteful number, since it uses less digits than its factorization.

1659549642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175498.

The product of its digits is 2332800, while the sum is 51.

The square root of 1659549642 is about 40737.5703988345. The cubic root of 1659549642 is about 1183.9410604373.

The spelling of 1659549642 in words is "one billion, six hundred fifty-nine million, five hundred forty-nine thousand, six hundred forty-two".