611778894 has 16 divisors (see below), whose sum is σ = 1246644432. Its totient is φ = 200078528.

The previous prime is 611778889. The next prime is 611778907. The reversal of 611778894 is 498877116.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 961599 + ... + 962234.

It is an arithmetic number, because the mean of its divisors is an integer number (77915277).

Almost surely, 2^611778894 is an apocalyptic number.

611778894 is an abundant number, since it is smaller than the sum of its proper divisors (634865538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

611778894 is a wasteful number, since it uses less digits than its factorization.

611778894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1923891.

The product of its digits is 677376, while the sum is 51.

The square root of 611778894 is about 24734.1645098435. The cubic root of 611778894 is about 848.9162168761.

The spelling of 611778894 in words is "six hundred eleven million, seven hundred seventy-eight thousand, eight hundred ninety-four".