861301217964 has 72 divisors (see below), whose sum is σ = 2235627132480. Its totient is φ = 257855750240.

The previous prime is 861301217957. The next prime is 861301218013. The reversal of 861301217964 is 469712103168.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3452874 + ... + 3693905.

It is an arithmetic number, because the mean of its divisors is an integer number (31050376840).

Almost surely, 2^861301217964 is an apocalyptic number.

It is an amenable number.

861301217964 is an abundant number, since it is smaller than the sum of its proper divisors (1374325914516).

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

861301217964 is a wasteful number, since it uses less digits than its factorization.

861301217964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7146891 (or 7146878 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 861301217964 in words is "eight hundred sixty-one billion, three hundred one million, two hundred seventeen thousand, nine hundred sixty-four".