61139652 has 36 divisors (see below), whose sum is σ = 165952080. Its totient is φ = 17468304.

The previous prime is 61139647. The next prime is 61139653. The reversal of 61139652 is 25693116.

It is a happy number.

61139652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×61139652² = 7476114093362208, which contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 51402 + ... + 52577.

It is an arithmetic number, because the mean of its divisors is an integer number (4609780).

Almost surely, 2^61139652 is an apocalyptic number.

It is an amenable number.

61139652 is an abundant number, since it is smaller than the sum of its proper divisors (104812428).

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

61139652 is a wasteful number, since it uses less digits than its factorization.

61139652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104000 (or 103991 counting only the distinct ones).

The product of its digits is 9720, while the sum is 33.

The square root of 61139652 is about 7819.1848680025. The cubic root of 61139652 is about 393.9498935653.

The spelling of 61139652 in words is "sixty-one million, one hundred thirty-nine thousand, six hundred fifty-two".