856653844480 has 312 divisors, whose sum is σ = 2399500372320. Its totient is φ = 292709007360.

The previous prime is 856653844469. The next prime is 856653844481. The reversal of 856653844480 is 84448356658.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856653844481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 332163831 + ... + 332166409.

Almost surely, 2^856653844480 is an apocalyptic number.

856653844480 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 856653844480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1199750186160).

856653844480 is an abundant number, since it is smaller than the sum of its proper divisors (1542846527840).

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

856653844480 is a wasteful number, since it uses less digits than its factorization.

856653844480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2953 (or 2924 counting only the distinct ones).

The product of its (nonzero) digits is 88473600, while the sum is 61.

The spelling of 856653844480 in words is "eight hundred fifty-six billion, six hundred fifty-three million, eight hundred forty-four thousand, four hundred eighty".