61561325 has 12 divisors (see below), whose sum is σ = 87241440. Its totient is φ = 42213360.

The previous prime is 61561321. The next prime is 61561327. The reversal of 61561325 is 52316516.

It is not a de Polignac number, because 61561325 - 2² = 61561321 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61561321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 175715 + ... + 176064.

It is an arithmetic number, because the mean of its divisors is an integer number (7270120).

Almost surely, 2^61561325 is an apocalyptic number.

It is an amenable number.

61561325 is a deficient number, since it is larger than the sum of its proper divisors (25680115).

61561325 is a wasteful number, since it uses less digits than its factorization.

61561325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351796 (or 351791 counting only the distinct ones).

The product of its digits is 5400, while the sum is 29.

The square root of 61561325 is about 7846.1025356542. The cubic root of 61561325 is about 394.8534947788.

The spelling of 61561325 in words is "sixty-one million, five hundred sixty-one thousand, three hundred twenty-five".