156664161222 has 64 divisors (see below), whose sum is σ = 327656669184. Its totient is φ = 49900546080.

The previous prime is 156664161217. The next prime is 156664161229. The reversal of 156664161222 is 222161466651.

It is a super-2 number, since 2×156664161222² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156664161229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2024283 + ... + 2100249.

It is an arithmetic number, because the mean of its divisors is an integer number (5119635456).

Almost surely, 2^156664161222 is an apocalyptic number.

156664161222 is an abundant number, since it is smaller than the sum of its proper divisors (170992507962).

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

156664161222 is a wasteful number, since it uses less digits than its factorization.

156664161222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76193.

The product of its digits is 207360, while the sum is 42.

The spelling of 156664161222 in words is "one hundred fifty-six billion, six hundred sixty-four million, one hundred sixty-one thousand, two hundred twenty-two".