12161553460 has 24 divisors (see below), whose sum is σ = 29187728640. Its totient is φ = 4169675424.

The previous prime is 12161553457. The next prime is 12161553461. The reversal of 12161553460 is 6435516121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12161553461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43433980 + ... + 43434259.

It is an arithmetic number, because the mean of its divisors is an integer number (1216155360).

Almost surely, 2^12161553460 is an apocalyptic number.

12161553460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12161553460 is an abundant number, since it is smaller than the sum of its proper divisors (17026175180).

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

12161553460 is a wasteful number, since it uses less digits than its factorization.

12161553460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86868255 (or 86868253 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 12161553460 in words is "twelve billion, one hundred sixty-one million, five hundred fifty-three thousand, four hundred sixty".