1216362641 has 8 divisors (see below), whose sum is σ = 1319930304. Its totient is φ = 1114223760.

The previous prime is 1216362601. The next prime is 1216362671. The reversal of 1216362641 is 1462636121.

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

It is a de Polignac number, because none of the positive numbers 2^k-1216362641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1216362598 and 1216362607.

It is not an unprimeable number, because it can be changed into a prime (1216362601) 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, 355421 + ... + 358826.

It is an arithmetic number, because the mean of its divisors is an integer number (164991288).

Almost surely, 2^1216362641 is an apocalyptic number.

It is an amenable number.

1216362641 is a deficient number, since it is larger than the sum of its proper divisors (103567663).

1216362641 is a wasteful number, since it uses less digits than its factorization.

1216362641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714391.

The product of its digits is 10368, while the sum is 32.

The square root of 1216362641 is about 34876.3908826587. The cubic root of 1216362641 is about 1067.4667533116.

Adding to 1216362641 its reverse (1462636121), we get a palindrome (2678998762).

The spelling of 1216362641 in words is "one billion, two hundred sixteen million, three hundred sixty-two thousand, six hundred forty-one".