819021403472 has 80 divisors (see below), whose sum is σ = 1724249140992. Its totient is φ = 375350538240.

The previous prime is 819021403457. The next prime is 819021403511. The reversal of 819021403472 is 274304120918.

It is a super-2 number, since 2×819021403472² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

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, 6213353 + ... + 6343799.

Almost surely, 2^819021403472 is an apocalyptic number.

819021403472 is a gapful number since it is divisible by the number (82) 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 819021403472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (862124570496).

819021403472 is an abundant number, since it is smaller than the sum of its proper divisors (905227737520).

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

819021403472 is a wasteful number, since it uses less digits than its factorization.

819021403472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131076 (or 131070 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 819021403472 in words is "eight hundred nineteen billion, twenty-one million, four hundred three thousand, four hundred seventy-two".