61139650 has 96 divisors (see below), whose sum is σ = 141740928. Its totient is φ = 19276800.

The previous prime is 61139647. The next prime is 61139653. The reversal of 61139650 is 5693116.

61139650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61139647) and next prime (61139653).

It is not an unprimeable number, because it can be changed into a prime (61139653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 121299 + ... + 121801.

It is an arithmetic number, because the mean of its divisors is an integer number (1476468).

Almost surely, 2^61139650 is an apocalyptic number.

61139650 is an abundant number, since it is smaller than the sum of its proper divisors (80601278).

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

61139650 is a wasteful number, since it uses less digits than its factorization.

61139650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556 (or 551 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 61139650 is about 7819.1847401120. The cubic root of 61139650 is about 393.9498892697.

The spelling of 61139650 in words is "sixty-one million, one hundred thirty-nine thousand, six hundred fifty".