611771998 has 8 divisors (see below), whose sum is σ = 918600192. Its totient is φ = 305571936.

The previous prime is 611771981. The next prime is 611771999. The reversal of 611771998 is 899177116.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611771999) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 154590 + ... + 158497.

It is an arithmetic number, because the mean of its divisors is an integer number (114825024).

Almost surely, 2^611771998 is an apocalyptic number.

611771998 is a deficient number, since it is larger than the sum of its proper divisors (306828194).

611771998 is a wasteful number, since it uses less digits than its factorization.

611771998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314066.

The product of its digits is 190512, while the sum is 49.

The square root of 611771998 is about 24734.0251071272. The cubic root of 611771998 is about 848.9130271899.

The spelling of 611771998 in words is "six hundred eleven million, seven hundred seventy-one thousand, nine hundred ninety-eight".