61646530 has 32 divisors (see below), whose sum is σ = 122249088. Its totient is φ = 22195200.

The previous prime is 61646513. The next prime is 61646537. The reversal of 61646530 is 3564616.

61646530 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 2×61646530² = 7600589322081800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61646492 and 61646501.

It is not an unprimeable number, because it can be changed into a prime (61646537) 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 15 ways as a sum of consecutive naturals, for example, 8610 + ... + 14050.

It is an arithmetic number, because the mean of its divisors is an integer number (3820284).

Almost surely, 2^61646530 is an apocalyptic number.

61646530 is a deficient number, since it is larger than the sum of its proper divisors (60602558).

61646530 is a wasteful number, since it uses less digits than its factorization.

61646530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5562.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 61646530 is about 7851.5304240638. The cubic root of 61646530 is about 395.0355786998.

The spelling of 61646530 in words is "sixty-one million, six hundred forty-six thousand, five hundred thirty".