611778912 has 24 divisors (see below), whose sum is σ = 1605919896. Its totient is φ = 203926272.

The previous prime is 611778907. The next prime is 611778913. The reversal of 611778912 is 219877116.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611778913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3186253 + ... + 3186444.

It is an arithmetic number, because the mean of its divisors is an integer number (66913329).

Almost surely, 2^611778912 is an apocalyptic number.

It is an amenable number.

611778912 is an abundant number, since it is smaller than the sum of its proper divisors (994140984).

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

611778912 is a wasteful number, since it uses less digits than its factorization.

611778912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6372710 (or 6372702 counting only the distinct ones).

The product of its digits is 42336, while the sum is 42.

The square root of 611778912 is about 24734.1648737126. The cubic root of 611778912 is about 848.9162252019.

The spelling of 611778912 in words is "six hundred eleven million, seven hundred seventy-eight thousand, nine hundred twelve".