1216534845010 has 16 divisors (see below), whose sum is σ = 2190340106136. Its totient is φ = 486485630208.

The previous prime is 1216534845007. The next prime is 1216534845059. The reversal of 1216534845010 is 105484356121.

It can be written as a sum of positive squares in 4 ways, for example, as 753741721489 + 462793123521 = 868183^2 + 680289^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15998649 + ... + 16074508.

Almost surely, 2^{1216534845010} is an apocalyptic number.

1216534845010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216534845010 is a deficient number, since it is larger than the sum of its proper divisors (973805261126).

1216534845010 is a wasteful number, since it uses less digits than its factorization.

1216534845010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32076957.

The product of its (nonzero) digits is 115200, while the sum is 40.

The spelling of 1216534845010 in words is "one trillion, two hundred sixteen billion, five hundred thirty-four million, eight hundred forty-five thousand, ten".