2549901642 has 16 divisors (see below), whose sum is σ = 5100829632. Its totient is φ = 849796160.

The previous prime is 2549901581. The next prime is 2549901671. The reversal of 2549901642 is 2461099452.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 2549901594 and 2549901603.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8334 + ... + 71897.

It is an arithmetic number, because the mean of its divisors is an integer number (318801852).

Almost surely, 2^2549901642 is an apocalyptic number.

2549901642 is an abundant number, since it is smaller than the sum of its proper divisors (2550927990).

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

2549901642 is a wasteful number, since it uses less digits than its factorization.

2549901642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85533.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 2549901642 is about 50496.5507930987. The cubic root of 2549901642 is about 1366.1796422756.

The spelling of 2549901642 in words is "two billion, five hundred forty-nine million, nine hundred one thousand, six hundred forty-two".