2140256618 has 8 divisors (see below), whose sum is σ = 3210927780. Its totient is φ = 1069947360.

The previous prime is 2140256617. The next prime is 2140256623. The reversal of 2140256618 is 8166520412.

It can be written as a sum of positive squares in 2 ways, for example, as 2116276009 + 23980609 = 46003^2 + 4897^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2140256617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75173 + ... + 99656.

Almost surely, 2^2140256618 is an apocalyptic number.

2140256618 is a deficient number, since it is larger than the sum of its proper divisors (1070671162).

2140256618 is a wasteful number, since it uses less digits than its factorization.

2140256618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180952.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 2140256618 is about 46262.9075826412. The cubic root of 2140256618 is about 1288.7102503009.

The spelling of 2140256618 in words is "two billion, one hundred forty million, two hundred fifty-six thousand, six hundred eighteen".