1216400441630 has 16 divisors (see below), whose sum is σ = 2388568140144. Its totient is φ = 442327433280.

The previous prime is 1216400441521. The next prime is 1216400441647. The reversal of 1216400441630 is 361440046121.

It is a congruent number.

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, 5529092807 + ... + 5529093026.

It is an arithmetic number, because the mean of its divisors is an integer number (149285508759).

Almost surely, 2^{1216400441630} is an apocalyptic number.

1216400441630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216400441630 is a deficient number, since it is larger than the sum of its proper divisors (1172167698514).

1216400441630 is a wasteful number, since it uses less digits than its factorization.

1216400441630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11058185851.

The product of its (nonzero) digits is 13824, while the sum is 32.

Adding to 1216400441630 its reverse (361440046121), we get a palindrome (1577840487751).

The spelling of 1216400441630 in words is "one trillion, two hundred sixteen billion, four hundred million, four hundred forty-one thousand, six hundred thirty".