61645433 has 2 divisors, whose sum is σ = 61645434. Its totient is φ = 61645432.

The previous prime is 61645421. The next prime is 61645469. The reversal of 61645433 is 33454616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52954729 + 8690704 = 7277^2 + 2948^2 .

It is a cyclic number.

It is not a de Polignac number, because 61645433 - 2¹⁰ = 61644409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61645433.

It is not a weakly prime, because it can be changed into another prime (61645033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30822716 + 30822717.

It is an arithmetic number, because the mean of its divisors is an integer number (30822717).

Almost surely, 2^61645433 is an apocalyptic number.

It is an amenable number.

61645433 is a deficient number, since it is larger than the sum of its proper divisors (1).

61645433 is an equidigital number, since it uses as much as digits as its factorization.

61645433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 32.

The square root of 61645433 is about 7851.4605647612. The cubic root of 61645433 is about 395.0332354666.

The spelling of 61645433 in words is "sixty-one million, six hundred forty-five thousand, four hundred thirty-three".