800820625408 has 68 divisors (see below), whose sum is σ = 1604063675088. Its totient is φ = 399801712640.

The previous prime is 800820625399. The next prime is 800820625427. The reversal of 800820625408 is 804526028008.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44752143 + ... + 44770033.

Almost surely, 2^800820625408 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 800820625408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (802031837544).

800820625408 is an abundant number, since it is smaller than the sum of its proper divisors (803243049680).

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

800820625408 is an frugal number, since it uses more digits than its factorization.

800820625408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18606 (or 18576 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 43.

The spelling of 800820625408 in words is "eight hundred billion, eight hundred twenty million, six hundred twenty-five thousand, four hundred eight".