156922145906 has 4 divisors (see below), whose sum is σ = 235383218862. Its totient is φ = 78461072952.

The previous prime is 156922145879. The next prime is 156922145929. The reversal of 156922145906 is 609541229651.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 609541229651 = 47 ⋅12968962333.

It can be written as a sum of positive squares in only one way, i.e., 141457979881 + 15464166025 = 376109^2 + 124355^2 .

It is a super-3 number, since 3×156922145906³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39230536475 + ... + 39230536478.

Almost surely, 2^156922145906 is an apocalyptic number.

156922145906 is a deficient number, since it is larger than the sum of its proper divisors (78461072956).

156922145906 is an equidigital number, since it uses as much as digits as its factorization.

156922145906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78461072955.

The product of its (nonzero) digits is 1166400, while the sum is 50.

Adding to 156922145906 its sum of digits (50), we get a square (156922145956 = 396134²).

The spelling of 156922145906 in words is "one hundred fifty-six billion, nine hundred twenty-two million, one hundred forty-five thousand, nine hundred six".