1611355225499 has 4 divisors (see below), whose sum is σ = 1641758154336. Its totient is φ = 1580952296664.

The previous prime is 1611355225429. The next prime is 1611355225507. The reversal of 1611355225499 is 9945225531161.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1611355225499 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53), and also a Moran number because the ratio is a prime number: 30402928783 = 1611355225499 / (1 + 6 + 1 + 1 + 3 + 5 + 5 + 2 + 2 + 5 + 4 + 9 + 9).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1611355225499.

It is not an unprimeable number, because it can be changed into a prime (1611355225409) 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, 15201464339 + ... + 15201464444.

It is an arithmetic number, because the mean of its divisors is an integer number (410439538584).

Almost surely, 2^{1611355225499} is an apocalyptic number.

1611355225499 is a deficient number, since it is larger than the sum of its proper divisors (30402928837).

1611355225499 is an equidigital number, since it uses as much as digits as its factorization.

1611355225499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30402928836.

The product of its digits is 2916000, while the sum is 53.

The spelling of 1611355225499 in words is "one trillion, six hundred eleven billion, three hundred fifty-five million, two hundred twenty-five thousand, four hundred ninety-nine".