2678029491 has 16 divisors (see below), whose sum is σ = 3644611200. Its totient is φ = 1748776128.

The previous prime is 2678029489. The next prime is 2678029507. The reversal of 2678029491 is 1949208762.

It is not a de Polignac number, because 2678029491 - 2¹ = 2678029489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2678029491.

It is not an unprimeable number, because it can be changed into a prime (2678029391) 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, 18301 + ... + 75438.

It is an arithmetic number, because the mean of its divisors is an integer number (227788200).

Almost surely, 2^2678029491 is an apocalyptic number.

2678029491 is a deficient number, since it is larger than the sum of its proper divisors (966581709).

2678029491 is a wasteful number, since it uses less digits than its factorization.

2678029491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93938.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 2678029491 is about 51749.6810714810. The cubic root of 2678029491 is about 1388.6893933172.

The spelling of 2678029491 in words is "two billion, six hundred seventy-eight million, twenty-nine thousand, four hundred ninety-one".