1216474317490 has 16 divisors (see below), whose sum is σ = 2194854856920. Its totient is φ = 485433930240.

The previous prime is 1216474317449. The next prime is 1216474317559. The reversal of 1216474317490 is 947134746121.

It can be written as a sum of positive squares in 4 ways, for example, as 891413557609 + 325060759881 = 944147^2 + 570141^2 .

It is a super-2 number, since 2×1216474317490² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144470175 + ... + 144478594.

Almost surely, 2^{1216474317490} is an apocalyptic number.

1216474317490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216474317490 is a deficient number, since it is larger than the sum of its proper divisors (978380539430).

1216474317490 is a wasteful number, since it uses less digits than its factorization.

1216474317490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288949197.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The spelling of 1216474317490 in words is "one trillion, two hundred sixteen billion, four hundred seventy-four million, three hundred seventeen thousand, four hundred ninety".