2781946158 has 64 divisors (see below), whose sum is σ = 5838842880. Its totient is φ = 882807552.

The previous prime is 2781946157. The next prime is 2781946159. The reversal of 2781946158 is 8516491872.

It is an interprime number because it is at equal distance from previous prime (2781946157) and next prime (2781946159).

It is a self number, because there is not a number n which added to its sum of digits gives 2781946158.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781946151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2034391 + ... + 2035757.

It is an arithmetic number, because the mean of its divisors is an integer number (91231920).

Almost surely, 2^2781946158 is an apocalyptic number.

2781946158 is an abundant number, since it is smaller than the sum of its proper divisors (3056896722).

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

2781946158 is a wasteful number, since it uses less digits than its factorization.

2781946158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601.

The product of its digits is 967680, while the sum is 51.

The square root of 2781946158 is about 52744.1575721899. The cubic root of 2781946158 is about 1406.4239070179.

The spelling of 2781946158 in words is "two billion, seven hundred eighty-one million, nine hundred forty-six thousand, one hundred fifty-eight".