817825701216 has 96 divisors (see below), whose sum is σ = 2159837422848. Its totient is φ = 270953003520.

The previous prime is 817825701193. The next prime is 817825701227. The reversal of 817825701216 is 612107528718.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90193515 + ... + 90202581.

It is an arithmetic number, because the mean of its divisors is an integer number (22498306488).

Almost surely, 2^817825701216 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 817825701216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1079918711424).

817825701216 is an abundant number, since it is smaller than the sum of its proper divisors (1342011721632).

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

817825701216 is a wasteful number, since it uses less digits than its factorization.

817825701216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14684 (or 14676 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 48.

The spelling of 817825701216 in words is "eight hundred seventeen billion, eight hundred twenty-five million, seven hundred one thousand, two hundred sixteen".