12156793290 has 96 divisors (see below), whose sum is σ = 33309035136. Its totient is φ = 3070108800.

The previous prime is 12156793277. The next prime is 12156793291. The reversal of 12156793290 is 9239765121.

It is a happy number.

12156793290 is a `hidden beast` number, since 1 + 215 + 67 + 93 + 290 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (12156793291) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 179997 + ... + 238143.

It is an arithmetic number, because the mean of its divisors is an integer number (346969116).

Almost surely, 2^12156793290 is an apocalyptic number.

12156793290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12156793290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16654517568).

12156793290 is an abundant number, since it is smaller than the sum of its proper divisors (21152241846).

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

12156793290 is a wasteful number, since it uses less digits than its factorization.

12156793290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58284 (or 58281 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The spelling of 12156793290 in words is "twelve billion, one hundred fifty-six million, seven hundred ninety-three thousand, two hundred ninety".