61561626 has 32 divisors (see below), whose sum is σ = 141004800. Its totient is φ = 17552496.

The previous prime is 61561613. The next prime is 61561631. The reversal of 61561626 is 62616516.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23935 + ... + 26381.

It is an arithmetic number, because the mean of its divisors is an integer number (4406400).

Almost surely, 2^61561626 is an apocalyptic number.

61561626 is an abundant number, since it is smaller than the sum of its proper divisors (79443174).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61561626 is a wasteful number, since it uses less digits than its factorization.

61561626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3058.

The product of its digits is 12960, while the sum is 33.

The square root of 61561626 is about 7846.1217171288. The cubic root of 61561626 is about 394.8541383143.

The spelling of 61561626 in words is "sixty-one million, five hundred sixty-one thousand, six hundred twenty-six".