1611225913 has 16 divisors (see below), whose sum is σ = 1803658752. Its totient is φ = 1426576000.

The previous prime is 1611225907. The next prime is 1611225929. The reversal of 1611225913 is 3195221161.

It is a cyclic number.

It is not a de Polignac number, because 1611225913 - 2¹⁷ = 1611094841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1611225943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291768 + ... + 297238.

It is an arithmetic number, because the mean of its divisors is an integer number (112728672).

Almost surely, 2^1611225913 is an apocalyptic number.

It is an amenable number.

1611225913 is a deficient number, since it is larger than the sum of its proper divisors (192432839).

1611225913 is a wasteful number, since it uses less digits than its factorization.

1611225913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6176.

The product of its digits is 3240, while the sum is 31.

The square root of 1611225913 is about 40140.0786371925. The cubic root of 1611225913 is about 1172.3361201392.

It can be divided in two parts, 16112 and 25913, that added together give a square (42025 = 205²).

The spelling of 1611225913 in words is "one billion, six hundred eleven million, two hundred twenty-five thousand, nine hundred thirteen".