61843545 has 12 divisors (see below), whose sum is σ = 107195556. Its totient is φ = 32983200.

The previous prime is 61843541. The next prime is 61843547. The reversal of 61843545 is 54534816.

It is a happy number.

61843545 is a `hidden beast` number, since 618 + 4 + 35 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9960336 + 51883209 = 3156^2 + 7203^2 .

It is not a de Polignac number, because 61843545 - 2² = 61843541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61843541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 687106 + ... + 687195.

It is an arithmetic number, because the mean of its divisors is an integer number (8932963).

Almost surely, 2^61843545 is an apocalyptic number.

It is an amenable number.

61843545 is a deficient number, since it is larger than the sum of its proper divisors (45352011).

61843545 is a wasteful number, since it uses less digits than its factorization.

61843545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374312 (or 1374309 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 61843545 is about 7864.0666960549. The cubic root of 61843545 is about 395.4559601434.

The spelling of 61843545 in words is "sixty-one million, eight hundred forty-three thousand, five hundred forty-five".