156221261200 has 30 divisors (see below), whose sum is σ = 375321580994. Its totient is φ = 62488504320.

The previous prime is 156221261177. The next prime is 156221261243. The reversal of 156221261200 is 2162122651.

It can be written as a sum of positive squares in 3 ways, for example, as 240498064 + 155980763136 = 15508^2 + 394944^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 195276177 + ... + 195276976.

Almost surely, 2^156221261200 is an apocalyptic number.

156221261200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156221261200 is an abundant number, since it is smaller than the sum of its proper divisors (219100319794).

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

156221261200 is a wasteful number, since it uses less digits than its factorization.

156221261200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390553171 (or 390553160 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 156221261200 its reverse (2162122651), we get a palindrome (158383383851).

The spelling of 156221261200 in words is "one hundred fifty-six billion, two hundred twenty-one million, two hundred sixty-one thousand, two hundred".