12277320156 has 36 divisors (see below), whose sum is σ = 31239876304. Its totient is φ = 4065336000.

The previous prime is 12277320137. The next prime is 12277320157. The reversal of 12277320156 is 65102377221.

12277320156 = T₁₁₅ + T₁₁₆ + ... + T₄₁₉₁.

12277320156 is a `hidden beast` number, since 12 + 277 + 320 + 1 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 12277320156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12277320157) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1123825 + ... + 1134696.

Almost surely, 2^12277320156 is an apocalyptic number.

It is an amenable number.

12277320156 is an abundant number, since it is smaller than the sum of its proper divisors (18962556148).

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

12277320156 is a wasteful number, since it uses less digits than its factorization.

12277320156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2258682 (or 2258677 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

Adding to 12277320156 its reverse (65102377221), we get a palindrome (77379697377).

The spelling of 12277320156 in words is "twelve billion, two hundred seventy-seven million, three hundred twenty thousand, one hundred fifty-six".