61167553 has 2 divisors, whose sum is σ = 61167554. Its totient is φ = 61167552.

The previous prime is 61167551. The next prime is 61167563. The reversal of 61167553 is 35576116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54287424 + 6880129 = 7368^2 + 2623^2 .

It is a cyclic number.

It is not a de Polignac number, because 61167553 - 2¹ = 61167551 is a prime.

Together with 61167551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61167551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30583776 + 30583777.

It is an arithmetic number, because the mean of its divisors is an integer number (30583777).

Almost surely, 2^61167553 is an apocalyptic number.

It is an amenable number.

61167553 is a deficient number, since it is larger than the sum of its proper divisors (1).

61167553 is an equidigital number, since it uses as much as digits as its factorization.

61167553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18900, while the sum is 34.

The square root of 61167553 is about 7820.9688018813. The cubic root of 61167553 is about 394.0098106243.

The spelling of 61167553 in words is "sixty-one million, one hundred sixty-seven thousand, five hundred fifty-three".