2180807858 has 4 divisors (see below), whose sum is σ = 3271211790. Its totient is φ = 1090403928.

The previous prime is 2180807843. The next prime is 2180807873. The reversal of 2180807858 is 8587080812.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2180807843) and next prime (2180807873).

It can be written as a sum of positive squares in only one way, i.e., 1616602849 + 564205009 = 40207^2 + 23753^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545201963 + ... + 545201966.

Almost surely, 2^2180807858 is an apocalyptic number.

2180807858 is a deficient number, since it is larger than the sum of its proper divisors (1090403932).

2180807858 is a wasteful number, since it uses less digits than its factorization.

2180807858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090403931.

The product of its (nonzero) digits is 286720, while the sum is 47.

The square root of 2180807858 is about 46699.1205270506. The cubic root of 2180807858 is about 1296.7984053262.

The spelling of 2180807858 in words is "two billion, one hundred eighty million, eight hundred seven thousand, eight hundred fifty-eight".