2157936429228 has 12 divisors (see below), whose sum is σ = 5035185001560. Its totient is φ = 719312143072.

The previous prime is 2157936429227. The next prime is 2157936429247. The reversal of 2157936429228 is 8229246397512.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (2157936429227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89914017873 + ... + 89914017896.

It is an arithmetic number, because the mean of its divisors is an integer number (419598750130).

Almost surely, 2^{2157936429228} is an apocalyptic number.

It is an amenable number.

2157936429228 is an abundant number, since it is smaller than the sum of its proper divisors (2877248572332).

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

2157936429228 is a wasteful number, since it uses less digits than its factorization.

2157936429228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179828035776 (or 179828035774 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 60.

The spelling of 2157936429228 in words is "two trillion, one hundred fifty-seven billion, nine hundred thirty-six million, four hundred twenty-nine thousand, two hundred twenty-eight".