820454373156 has 96 divisors (see below), whose sum is σ = 2102435371008. Its totient is φ = 246956895360.

The previous prime is 820454373143. The next prime is 820454373191. The reversal of 820454373156 is 651373454028.

820454373156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41580565 + ... + 41600291.

It is an arithmetic number, because the mean of its divisors is an integer number (21900368448).

Almost surely, 2^820454373156 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 820454373156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1051217685504).

820454373156 is an abundant number, since it is smaller than the sum of its proper divisors (1281980997852).

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

820454373156 is a wasteful number, since it uses less digits than its factorization.

820454373156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21841 (or 21839 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 48.

The spelling of 820454373156 in words is "eight hundred twenty billion, four hundred fifty-four million, three hundred seventy-three thousand, one hundred fifty-six".