156828666281 has 4 divisors (see below), whose sum is σ = 179232761472. Its totient is φ = 134424571092.

The previous prime is 156828666277. The next prime is 156828666301. The reversal of 156828666281 is 182666828651.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 156828666281 - 2² = 156828666277 is a prime.

It is a super-2 number, since 2×156828666281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 156828666281.

It is not an unprimeable number, because it can be changed into a prime (156828662281) 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, 11202047585 + ... + 11202047598.

It is an arithmetic number, because the mean of its divisors is an integer number (44808190368).

Almost surely, 2^156828666281 is an apocalyptic number.

It is an amenable number.

156828666281 is a deficient number, since it is larger than the sum of its proper divisors (22404095191).

156828666281 is an equidigital number, since it uses as much as digits as its factorization.

156828666281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22404095190.

The product of its digits is 13271040, while the sum is 59.

The spelling of 156828666281 in words is "one hundred fifty-six billion, eight hundred twenty-eight million, six hundred sixty-six thousand, two hundred eighty-one".