612181994 has 16 divisors (see below), whose sum is σ = 936131040. Its totient is φ = 300163920.

The previous prime is 612181987. The next prime is 612182023. The reversal of 612181994 is 499181216.

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 in 7 ways as a sum of consecutive naturals, for example, 43517 + ... + 55839.

It is an arithmetic number, because the mean of its divisors is an integer number (58508190).

Almost surely, 2^612181994 is an apocalyptic number.

612181994 is a deficient number, since it is larger than the sum of its proper divisors (323949046).

612181994 is a wasteful number, since it uses less digits than its factorization.

612181994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12805.

The product of its digits is 31104, while the sum is 41.

The square root of 612181994 is about 24742.3118159965. The cubic root of 612181994 is about 849.1026257242.

The spelling of 612181994 in words is "six hundred twelve million, one hundred eighty-one thousand, nine hundred ninety-four".