156822991920 has 1200 divisors, whose sum is σ = 671988829248. Its totient is φ = 33189212160.

The previous prime is 156822991837. The next prime is 156822991937. The reversal of 156822991920 is 29199228651.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 998872482 + ... + 998872638.

Almost surely, 2^156822991920 is an apocalyptic number.

156822991920 is a gapful number since it is divisible by the number (10) 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 156822991920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335994414624).

156822991920 is an abundant number, since it is smaller than the sum of its proper divisors (515165837328).

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

156822991920 is a wasteful number, since it uses less digits than its factorization.

156822991920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

The spelling of 156822991920 in words is "one hundred fifty-six billion, eight hundred twenty-two million, nine hundred ninety-one thousand, nine hundred twenty".