1216589610 has 32 divisors (see below), whose sum is σ = 2936139840. Its totient is φ = 322610048.

The previous prime is 1216589593. The next prime is 1216589629. The reversal of 1216589610 is 169856121.

1216589610 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between odd and even.

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, 107907 + ... + 118646.

It is an arithmetic number, because the mean of its divisors is an integer number (91754370).

Almost surely, 2^1216589610 is an apocalyptic number.

1216589610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216589610 is an abundant number, since it is smaller than the sum of its proper divisors (1719550230).

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

1216589610 is a wasteful number, since it uses less digits than its factorization.

1216589610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226742.

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 1216589610 is about 34879.6446369512. The cubic root of 1216589610 is about 1067.5331443656.

The spelling of 1216589610 in words is "one billion, two hundred sixteen million, five hundred eighty-nine thousand, six hundred ten".