1611355225501 has 4 divisors (see below), whose sum is σ = 1841548829152. Its totient is φ = 1381161621852.

The previous prime is 1611355225429. The next prime is 1611355225507. The reversal of 1611355225501 is 1055225531161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1611355225501 - 2⁹ = 1611355224989 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 (1611355225507) 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, 115096801815 + ... + 115096801828.

It is an arithmetic number, because the mean of its divisors is an integer number (460387207288).

Almost surely, 2^{1611355225501} is an apocalyptic number.

It is an amenable number.

1611355225501 is a deficient number, since it is larger than the sum of its proper divisors (230193603651).

1611355225501 is an equidigital number, since it uses as much as digits as its factorization.

1611355225501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230193603650.

The product of its (nonzero) digits is 45000, while the sum is 37.

The spelling of 1611355225501 in words is "one trillion, six hundred eleven billion, three hundred fifty-five million, two hundred twenty-five thousand, five hundred one".