61008553 has 2 divisors, whose sum is σ = 61008554. Its totient is φ = 61008552.

The previous prime is 61008517. The next prime is 61008583. The reversal of 61008553 is 35580016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35485849 + 25522704 = 5957^2 + 5052^2 .

It is a cyclic number.

It is not a de Polignac number, because 61008553 - 2²¹ = 58911401 is a prime.

It is not a weakly prime, because it can be changed into another prime (61008503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30504276 + 30504277.

It is an arithmetic number, because the mean of its divisors is an integer number (30504277).

Almost surely, 2^61008553 is an apocalyptic number.

It is an amenable number.

61008553 is a deficient number, since it is larger than the sum of its proper divisors (1).

61008553 is an equidigital number, since it uses as much as digits as its factorization.

61008553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 61008553 is about 7810.7972064316. The cubic root of 61008553 is about 393.6681157348.

Adding to 61008553 its reverse (35580016), we get a palindrome (96588569).

The spelling of 61008553 in words is "sixty-one million, eight thousand, five hundred fifty-three".