61156530 has 24 divisors (see below), whose sum is σ = 159007212. Its totient is φ = 16308384.

The previous prime is 61156477. The next prime is 61156561. The reversal of 61156530 is 3565116.

It is a happy number.

61156530 is a `hidden beast` number, since 6 + 1 + 1 + 5 + 653 + 0 = 666.

61156530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 57927321 + 3229209 = 7611^2 + 1797^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61156494 and 61156503.

It is an unprimeable number.

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, 339669 + ... + 339848.

Almost surely, 2^61156530 is an apocalyptic number.

61156530 is an abundant number, since it is smaller than the sum of its proper divisors (97850682).

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

61156530 is a wasteful number, since it uses less digits than its factorization.

61156530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679530 (or 679527 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 61156530 is about 7820.2640620378. The cubic root of 61156530 is about 393.9861410433.

The spelling of 61156530 in words is "sixty-one million, one hundred fifty-six thousand, five hundred thirty".