1216536160 has 48 divisors (see below), whose sum is σ = 3284650656. Its totient is φ = 417097728.

The previous prime is 1216536157. The next prime is 1216536187. The reversal of 1216536160 is 616356121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 541977 + ... + 544216.

It is an arithmetic number, because the mean of its divisors is an integer number (68430222).

Almost surely, 2^1216536160 is an apocalyptic number.

1216536160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1216536160 is an abundant number, since it is smaller than the sum of its proper divisors (2068114496).

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

1216536160 is a wasteful number, since it uses less digits than its factorization.

1216536160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086215 (or 1086207 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1216536160 is about 34878.8784223346. The cubic root of 1216536160 is about 1067.5175103666.

The spelling of 1216536160 in words is "one billion, two hundred sixteen million, five hundred thirty-six thousand, one hundred sixty".