1216049671 has 8 divisors (see below), whose sum is σ = 1228040000. Its totient is φ = 1204074720.

The previous prime is 1216049657. The next prime is 1216049687. The reversal of 1216049671 is 1769406121.

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

It is a cyclic number.

It is not a de Polignac number, because 1216049671 - 2¹³ = 1216041479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1216049671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216049651) 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, 215101 + ... + 220681.

It is an arithmetic number, because the mean of its divisors is an integer number (153505000).

Almost surely, 2^1216049671 is an apocalyptic number.

1216049671 is a deficient number, since it is larger than the sum of its proper divisors (11990329).

1216049671 is a wasteful number, since it uses less digits than its factorization.

1216049671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7689.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 1216049671 is about 34871.9037478598. The cubic root of 1216049671 is about 1067.3751924245.

The spelling of 1216049671 in words is "one billion, two hundred sixteen million, forty-nine thousand, six hundred seventy-one".