1216904411 has 8 divisors (see below), whose sum is σ = 1256623104. Its totient is φ = 1177214760.

The previous prime is 1216904393. The next prime is 1216904431. The reversal of 1216904411 is 1144096121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1216904411 is a prime.

It is a super-2 number, since 2×1216904411² = 2961712691022513842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216904431) 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, 106376 + ... + 117258.

It is an arithmetic number, because the mean of its divisors is an integer number (157077888).

Almost surely, 2^1216904411 is an apocalyptic number.

1216904411 is a deficient number, since it is larger than the sum of its proper divisors (39718693).

1216904411 is a wasteful number, since it uses less digits than its factorization.

1216904411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14521.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 1216904411 is about 34884.1570200571. The cubic root of 1216904411 is about 1067.6252136267.

The spelling of 1216904411 in words is "one billion, two hundred sixteen million, nine hundred four thousand, four hundred eleven".