61804553 has 2 divisors, whose sum is σ = 61804554. Its totient is φ = 61804552.

The previous prime is 61804493. The next prime is 61804573. The reversal of 61804553 is 35540816.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43072969 + 18731584 = 6563^2 + 4328^2 .

It is a cyclic number.

It is not a de Polignac number, because 61804553 - 2¹⁴ = 61788169 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61804573) 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, 30902276 + 30902277.

It is an arithmetic number, because the mean of its divisors is an integer number (30902277).

Almost surely, 2^61804553 is an apocalyptic number.

It is an amenable number.

61804553 is a deficient number, since it is larger than the sum of its proper divisors (1).

61804553 is an equidigital number, since it uses as much as digits as its factorization.

61804553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 61804553 is about 7861.5871807161. The cubic root of 61804553 is about 395.3728317663.

The spelling of 61804553 in words is "sixty-one million, eight hundred four thousand, five hundred fifty-three".