61161650 has 48 divisors (see below), whose sum is σ = 126206208. Its totient is φ = 21864000.

The previous prime is 61161649. The next prime is 61161671. The reversal of 61161650 is 5616116.

61161650 = T₄₅ + T₄₆ + ... + T₇₁₅.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32639 + ... + 34461.

It is an arithmetic number, because the mean of its divisors is an integer number (2629296).

Almost surely, 2^61161650 is an apocalyptic number.

61161650 is an abundant number, since it is smaller than the sum of its proper divisors (65044558).

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

61161650 is a wasteful number, since it uses less digits than its factorization.

61161650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1907 (or 1902 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 61161650 is about 7820.5914098615. The cubic root of 61161650 is about 393.9971355233.

Adding to 61161650 its reverse (5616116), we get a palindrome (66777766).

The spelling of 61161650 in words is "sixty-one million, one hundred sixty-one thousand, six hundred fifty".