12155026320 has 80 divisors (see below), whose sum is σ = 41867320320. Its totient is φ = 3241339776.

The previous prime is 12155026291. The next prime is 12155026349. The reversal of 12155026320 is 2362055121.

It is a happy number.

12155026320 is a `hidden beast` number, since 1 + 21 + 5 + 5 + 0 + 2 + 632 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (12155026291) and next prime (12155026349).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2811504 + ... + 2815823.

It is an arithmetic number, because the mean of its divisors is an integer number (523341504).

Almost surely, 2^12155026320 is an apocalyptic number.

12155026320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12155026320 is an abundant number, since it is smaller than the sum of its proper divisors (29712294000).

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

12155026320 is a wasteful number, since it uses less digits than its factorization.

12155026320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5627349 (or 5627337 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 12155026320 in words is "twelve billion, one hundred fifty-five million, twenty-six thousand, three hundred twenty".