1611378430855 has 32 divisors (see below), whose sum is σ = 2021285320704. Its totient is φ = 1232308982016.

The previous prime is 1611378430841. The next prime is 1611378430859. The reversal of 1611378430855 is 5580348731161.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1611378430855 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611378430859) 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 31 ways as a sum of consecutive naturals, for example, 1310992 + ... + 2222938.

It is an arithmetic number, because the mean of its divisors is an integer number (63165166272).

Almost surely, 2^{1611378430855} is an apocalyptic number.

1611378430855 is a deficient number, since it is larger than the sum of its proper divisors (409906889849).

1611378430855 is a wasteful number, since it uses less digits than its factorization.

1611378430855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912175.

The product of its (nonzero) digits is 2419200, while the sum is 52.

The spelling of 1611378430855 in words is "one trillion, six hundred eleven billion, three hundred seventy-eight million, four hundred thirty thousand, eight hundred fifty-five".