1216762084427 has 4 divisors (see below), whose sum is σ = 1227925039440. Its totient is φ = 1205599129416.

The previous prime is 1216762084411. The next prime is 1216762084469. The reversal of 1216762084427 is 7244802676121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1216762084427 - 2⁴ = 1216762084411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216762086427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5581477343 + ... + 5581477560.

It is an arithmetic number, because the mean of its divisors is an integer number (306981259860).

Almost surely, 2^{1216762084427} is an apocalyptic number.

1216762084427 is a deficient number, since it is larger than the sum of its proper divisors (11162955013).

1216762084427 is a wasteful number, since it uses less digits than its factorization.

1216762084427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11162955012.

The product of its (nonzero) digits is 1806336, while the sum is 50.

The spelling of 1216762084427 in words is "one trillion, two hundred sixteen billion, seven hundred sixty-two million, eighty-four thousand, four hundred twenty-seven".