61650553 has 2 divisors, whose sum is σ = 61650554. Its totient is φ = 61650552.

The previous prime is 61650541. The next prime is 61650571. The reversal of 61650553 is 35505616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42614784 + 19035769 = 6528^2 + 4363^2 .

It is a cyclic number.

It is not a de Polignac number, because 61650553 - 2⁵ = 61650521 is a prime.

It is not a weakly prime, because it can be changed into another prime (61650583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30825276 + 30825277.

It is an arithmetic number, because the mean of its divisors is an integer number (30825277).

Almost surely, 2^61650553 is an apocalyptic number.

It is an amenable number.

61650553 is a deficient number, since it is larger than the sum of its proper divisors (1).

61650553 is an equidigital number, since it uses as much as digits as its factorization.

61650553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 61650553 is about 7851.7866119756. The cubic root of 61650553 is about 395.0441717413.

The spelling of 61650553 in words is "sixty-one million, six hundred fifty thousand, five hundred fifty-three".