861064906 has 16 divisors (see below), whose sum is σ = 1391443200. Its totient is φ = 397273968.

The previous prime is 861064901. The next prime is 861064913. The reversal of 861064906 is 609460168.

It is not an unprimeable number, because it can be changed into a prime (861064901) 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, 120255 + ... + 127213.

It is an arithmetic number, because the mean of its divisors is an integer number (86965200).

Almost surely, 2^861064906 is an apocalyptic number.

861064906 is a deficient number, since it is larger than the sum of its proper divisors (530378294).

861064906 is a wasteful number, since it uses less digits than its factorization.

861064906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11733.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 861064906 is about 29343.9074766807. The cubic root of 861064906 is about 951.3608957243.

The spelling of 861064906 in words is "eight hundred sixty-one million, sixty-four thousand, nine hundred six".