861018664324 has 216 divisors, whose sum is σ = 1961318399040. Its totient is φ = 329415061248.

The previous prime is 861018664249. The next prime is 861018664339. The reversal of 861018664324 is 423466810168.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 146703262 + ... + 146709130.

Almost surely, 2^861018664324 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 861018664324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (980659199520).

861018664324 is an abundant number, since it is smaller than the sum of its proper divisors (1100299734716).

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

861018664324 is a wasteful number, since it uses less digits than its factorization.

861018664324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6059 (or 6037 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 49.

The spelling of 861018664324 in words is "eight hundred sixty-one billion, eighteen million, six hundred sixty-four thousand, three hundred twenty-four".