2149545642 has 16 divisors (see below), whose sum is σ = 4437772032. Its totient is φ = 693401760.

The previous prime is 2149545631. The next prime is 2149545647. The reversal of 2149545642 is 2465459412.

It is a junction number, because it is equal to n+sod(n) for n = 2149545594 and 2149545603.

It is not an unprimeable number, because it can be changed into a prime (2149545647) 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, 5778163 + ... + 5778534.

It is an arithmetic number, because the mean of its divisors is an integer number (277360752).

Almost surely, 2^2149545642 is an apocalyptic number.

2149545642 is an abundant number, since it is smaller than the sum of its proper divisors (2288226390).

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

2149545642 is a wasteful number, since it uses less digits than its factorization.

2149545642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11556733.

The product of its digits is 345600, while the sum is 42.

The square root of 2149545642 is about 46363.1927502841. The cubic root of 2149545642 is about 1290.5719559733.

The spelling of 2149545642 in words is "two billion, one hundred forty-nine million, five hundred forty-five thousand, six hundred forty-two".