1216471061642 has 32 divisors (see below), whose sum is σ = 1945850860800. Its totient is φ = 568733695488.

The previous prime is 1216471061609. The next prime is 1216471061669. The reversal of 1216471061642 is 2461601746121.

It is a self number, because there is not a number n which added to its sum of digits gives 1216471061642.

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, 433598 + ... + 1618934.

It is an arithmetic number, because the mean of its divisors is an integer number (60807839400).

Almost surely, 2^{1216471061642} is an apocalyptic number.

1216471061642 is a deficient number, since it is larger than the sum of its proper divisors (729379799158).

1216471061642 is a wasteful number, since it uses less digits than its factorization.

1216471061642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185710.

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 1216471061642 in words is "one trillion, two hundred sixteen billion, four hundred seventy-one million, sixty-one thousand, six hundred forty-two".