12155236040 has 64 divisors (see below), whose sum is σ = 27725967360. Its totient is φ = 4795580160.

The previous prime is 12155235979. The next prime is 12155236063. The reversal of 12155236040 is 4063255121.

It is a super-2 number, since 2×12155236040² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12155235994 and 12155236012.

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, 871925 + ... + 885755.

It is an arithmetic number, because the mean of its divisors is an integer number (433218240).

Almost surely, 2^12155236040 is an apocalyptic number.

12155236040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12155236040 is an abundant number, since it is smaller than the sum of its proper divisors (15570731320).

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

12155236040 is a wasteful number, since it uses less digits than its factorization.

12155236040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14142 (or 14138 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The spelling of 12155236040 in words is "twelve billion, one hundred fifty-five million, two hundred thirty-six thousand, forty".