2640586042 has 8 divisors (see below), whose sum is σ = 3961142676. Its totient is φ = 1320205152.

The previous prime is 2640586037. The next prime is 2640586057. The reversal of 2640586042 is 2406850462.

It can be written as a sum of positive squares in 2 ways, for example, as 2622361681 + 18224361 = 51209^2 + 4269^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 2640585992 and 2640586010.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4158 + ... + 72790.

Almost surely, 2^2640586042 is an apocalyptic number.

2640586042 is a deficient number, since it is larger than the sum of its proper divisors (1320556634).

2640586042 is a wasteful number, since it uses less digits than its factorization.

2640586042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87872.

The product of its (nonzero) digits is 92160, while the sum is 37.

The square root of 2640586042 is about 51386.6329116824. The cubic root of 2640586042 is about 1382.1869060684.

The spelling of 2640586042 in words is "two billion, six hundred forty million, five hundred eighty-six thousand, forty-two".