1216390619356 has 120 divisors (see below), whose sum is σ = 2423228904320. Its totient is φ = 533707574400.

The previous prime is 1216390619333. The next prime is 1216390619401. The reversal of 1216390619356 is 6539160936121.

It is a happy number.

It is a super-2 number, since 2×1216390619356² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1112891146 + ... + 1112892238.

Almost surely, 2^{1216390619356} is an apocalyptic number.

It is an amenable number.

1216390619356 is a deficient number, since it is larger than the sum of its proper divisors (1206838284964).

1216390619356 is a wasteful number, since it uses less digits than its factorization.

1216390619356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785 (or 1750 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 52.

The spelling of 1216390619356 in words is "one trillion, two hundred sixteen billion, three hundred ninety million, six hundred nineteen thousand, three hundred fifty-six".