860781841920 has 3600 divisors, whose sum is σ = 4338366389280. Its totient is φ = 159411732480.

The previous prime is 860781841901. The next prime is 860781841943. The reversal of 860781841920 is 29148187068.

860781841920 is a `hidden beast` number, since 8 + 607 + 8 + 1 + 8 + 4 + 1 + 9 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 359 ways as a sum of consecutive naturals, for example, 29682132466 + ... + 29682132494.

Almost surely, 2^860781841920 is an apocalyptic number.

860781841920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 860781841920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2169183194640).

860781841920 is an abundant number, since it is smaller than the sum of its proper divisors (3477584547360).

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

860781841920 is a wasteful number, since it uses less digits than its factorization.

860781841920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 54.

The spelling of 860781841920 in words is "eight hundred sixty billion, seven hundred eighty-one million, eight hundred forty-one thousand, nine hundred twenty".