861611330 has 16 divisors (see below), whose sum is σ = 1553183424. Its totient is φ = 344137200.

The previous prime is 861611291. The next prime is 861611347. The reversal of 861611330 is 33116168.

It is a junction number, because it is equal to n+sod(n) for n = 861611293 and 861611302.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56246 + ... + 69905.

It is an arithmetic number, because the mean of its divisors is an integer number (97073964).

Almost surely, 2^861611330 is an apocalyptic number.

861611330 is a deficient number, since it is larger than the sum of its proper divisors (691572094).

861611330 is a wasteful number, since it uses less digits than its factorization.

861611330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126841.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 861611330 is about 29353.2166891467. The cubic root of 861611330 is about 951.5620948434.

Adding to 861611330 its reverse (33116168), we get a palindrome (894727498).

The spelling of 861611330 in words is "eight hundred sixty-one million, six hundred eleven thousand, three hundred thirty".