862561404000 has 288 divisors, whose sum is σ = 3062625733440. Its totient is φ = 229911552000.

The previous prime is 862561403941. The next prime is 862561404007. The reversal of 862561404000 is 404165268.

862561404000 is a `hidden beast` number, since 8 + 62 + 56 + 140 + 400 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (862561404007) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 109472061 + ... + 109479939.

It is an arithmetic number, because the mean of its divisors is an integer number (10634117130).

Almost surely, 2^862561404000 is an apocalyptic number.

862561404000 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 862561404000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1531312866720).

862561404000 is an abundant number, since it is smaller than the sum of its proper divisors (2200064329440).

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

862561404000 is a wasteful number, since it uses less digits than its factorization.

862561404000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10951 (or 10930 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

Adding to 862561404000 its reverse (404165268), we get a palindrome (862965569268).

The spelling of 862561404000 in words is "eight hundred sixty-two billion, five hundred sixty-one million, four hundred four thousand".