6161275621 has 2 divisors, whose sum is σ = 6161275622. Its totient is φ = 6161275620.

The previous prime is 6161275613. The next prime is 6161275633. The reversal of 6161275621 is 1265721616.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4982383396 + 1178892225 = 70586^2 + 34335^2 .

It is a cyclic number.

It is not a de Polignac number, because 6161275621 - 2³ = 6161275613 is a prime.

It is a super-2 number, since 2×6161275621² = 75922634555857871282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6161276621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3080637810 + 3080637811.

It is an arithmetic number, because the mean of its divisors is an integer number (3080637811).

Almost surely, 2^6161275621 is an apocalyptic number.

It is an amenable number.

6161275621 is a deficient number, since it is larger than the sum of its proper divisors (1).

6161275621 is an equidigital number, since it uses as much as digits as its factorization.

6161275621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 6161275621 is about 78493.7935189783. The cubic root of 6161275621 is about 1833.2578178886.

The spelling of 6161275621 in words is "six billion, one hundred sixty-one million, two hundred seventy-five thousand, six hundred twenty-one".