2783155642 has 32 divisors (see below), whose sum is σ = 4270266000. Its totient is φ = 1360240128.

The previous prime is 2783155633. The next prime is 2783155649. The reversal of 2783155642 is 2465513872.

It can be written as a sum of positive squares in 8 ways, for example, as 1273133761 + 1510021881 = 35681^2 + 38859^2 .

It is not an unprimeable number, because it can be changed into a prime (2783155649) 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, 7974484 + ... + 7974832.

Almost surely, 2^2783155642 is an apocalyptic number.

2783155642 is a deficient number, since it is larger than the sum of its proper divisors (1487110358).

2783155642 is a wasteful number, since it uses less digits than its factorization.

2783155642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850.

The product of its digits is 403200, while the sum is 43.

The square root of 2783155642 is about 52755.6218994715. The cubic root of 2783155642 is about 1406.6276972975.

The spelling of 2783155642 in words is "two billion, seven hundred eighty-three million, one hundred fifty-five thousand, six hundred forty-two".