822131187737860 has 384 divisors, whose sum is σ = 2338465606041600. Its totient is φ = 234463999610880.

The previous prime is 822131187737857. The next prime is 822131187737869. The reversal of 822131187737860 is 68737781131228.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 822131187737792 and 822131187737801.

It is not an unprimeable number, because it can be changed into a prime (822131187737869) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1121294061 + ... + 1122027019.

It is an arithmetic number, because the mean of its divisors is an integer number (6089754182400).

Almost surely, 2^{822131187737860} 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 822131187737860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1169232803020800).

822131187737860 is an abundant number, since it is smaller than the sum of its proper divisors (1516334418303740).

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

822131187737860 is a wasteful number, since it uses less digits than its factorization.

822131187737860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733491 (or 733489 counting only the distinct ones).

The product of its (nonzero) digits is 37933056, while the sum is 64.

The spelling of 822131187737860 in words is "eight hundred twenty-two trillion, one hundred thirty-one billion, one hundred eighty-seven million, seven hundred thirty-seven thousand, eight hundred sixty".