61506045 has 12 divisors (see below), whose sum is σ = 106610556. Its totient is φ = 32803200.

The previous prime is 61506041. The next prime is 61506073. The reversal of 61506045 is 54060516.

It is a happy number.

61506045 is a `hidden beast` number, since 6 + 1 + 50 + 604 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13439556 + 48066489 = 3666^2 + 6933^2 .

It is not a de Polignac number, because 61506045 - 2² = 61506041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61506041) 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, 683356 + ... + 683445.

It is an arithmetic number, because the mean of its divisors is an integer number (8884213).

Almost surely, 2^61506045 is an apocalyptic number.

It is an amenable number.

61506045 is a deficient number, since it is larger than the sum of its proper divisors (45104511).

61506045 is a wasteful number, since it uses less digits than its factorization.

61506045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366812 (or 1366809 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 61506045 is about 7842.5789763317. The cubic root of 61506045 is about 394.7352709973.

It can be divided in two parts, 6 and 1506045, that added together give a palindrome (1506051).

The spelling of 61506045 in words is "sixty-one million, five hundred six thousand, forty-five".