1216146472436 has 36 divisors (see below), whose sum is σ = 2475885127716. Its totient is φ = 521172288000.

The previous prime is 1216146472399. The next prime is 1216146472441. The reversal of 1216146472436 is 6342746416121.

It can be written as a sum of positive squares in 2 ways, for example, as 907077188836 + 309069283600 = 952406^2 + 555940^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3004676 + ... + 3385316.

It is an arithmetic number, because the mean of its divisors is an integer number (68774586881).

Almost surely, 2^{1216146472436} is an apocalyptic number.

It is an amenable number.

1216146472436 is an abundant number, since it is smaller than the sum of its proper divisors (1259738655280).

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

1216146472436 is a wasteful number, since it uses less digits than its factorization.

1216146472436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396960 (or 396951 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 47.

The spelling of 1216146472436 in words is "one trillion, two hundred sixteen billion, one hundred forty-six million, four hundred seventy-two thousand, four hundred thirty-six".