611661604 has 12 divisors (see below), whose sum is σ = 1126745200. Its totient is φ = 289734408.

The previous prime is 611661569. The next prime is 611661637. The reversal of 611661604 is 406166116.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4024014 + ... + 4024165.

Almost surely, 2^611661604 is an apocalyptic number.

It is an amenable number.

611661604 is a deficient number, since it is larger than the sum of its proper divisors (515083596).

611661604 is a wasteful number, since it uses less digits than its factorization.

611661604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8048202 (or 8048200 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 611661604 is about 24731.7933842251. The cubic root of 611661604 is about 848.8619621185.

The spelling of 611661604 in words is "six hundred eleven million, six hundred sixty-one thousand, six hundred four".