1611567253 has 2 divisors, whose sum is σ = 1611567254. Its totient is φ = 1611567252.

The previous prime is 1611567193. The next prime is 1611567263. The reversal of 1611567253 is 3527651161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1081554769 + 530012484 = 32887^2 + 23022^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1611567253 is a prime.

It is a super-3 number, since 3×1611567253³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1611567263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805783626 + 805783627.

It is an arithmetic number, because the mean of its divisors is an integer number (805783627).

Almost surely, 2^1611567253 is an apocalyptic number.

It is an amenable number.

1611567253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1611567253 is an equidigital number, since it uses as much as digits as its factorization.

1611567253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 37.

The square root of 1611567253 is about 40144.3302721567. The cubic root of 1611567253 is about 1172.4189011969.

The spelling of 1611567253 in words is "one billion, six hundred eleven million, five hundred sixty-seven thousand, two hundred fifty-three".