611631172 has 24 divisors (see below), whose sum is σ = 1084648320. Its totient is φ = 301751040.

The previous prime is 611631169. The next prime is 611631173. The reversal of 611631172 is 271136116.

It is a self number, because there is not a number n which added to its sum of digits gives 611631172.

It is not an unprimeable number, because it can be changed into a prime (611631173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137097 + ... + 141487.

It is an arithmetic number, because the mean of its divisors is an integer number (45193680).

Almost surely, 2^611631172 is an apocalyptic number.

It is an amenable number.

611631172 is a deficient number, since it is larger than the sum of its proper divisors (473017148).

611631172 is a wasteful number, since it uses less digits than its factorization.

611631172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4851 (or 4849 counting only the distinct ones).

The product of its digits is 1512, while the sum is 28.

The square root of 611631172 is about 24731.1781361099. The cubic root of 611631172 is about 848.8478840752.

Adding to 611631172 its reverse (271136116), we get a palindrome (882767288).

The spelling of 611631172 in words is "six hundred eleven million, six hundred thirty-one thousand, one hundred seventy-two".