1216323461436 has 48 divisors (see below), whose sum is σ = 3054297324960. Its totient is φ = 375336069120.

The previous prime is 1216323461413. The next prime is 1216323461443. The reversal of 1216323461436 is 6341643236121.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 48859441 + ... + 48884328.

It is an arithmetic number, because the mean of its divisors is an integer number (63631194270).

Almost surely, 2^{1216323461436} is an apocalyptic number.

It is an amenable number.

1216323461436 is an abundant number, since it is smaller than the sum of its proper divisors (1837973863524).

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

1216323461436 is a wasteful number, since it uses less digits than its factorization.

1216323461436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97743854 (or 97743852 counting only the distinct ones).

The product of its digits is 373248, while the sum is 42.

Adding to 1216323461436 its reverse (6341643236121), we get a palindrome (7557966697557).

The spelling of 1216323461436 in words is "one trillion, two hundred sixteen billion, three hundred twenty-three million, four hundred sixty-one thousand, four hundred thirty-six".