61615012 has 12 divisors (see below), whose sum is σ = 108873856. Its totient is φ = 30508200.

The previous prime is 61615003. The next prime is 61615013. The reversal of 61615012 is 21051616.

61615012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (61615013) 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 3 ways as a sum of consecutive naturals, for example, 74364 + ... + 75187.

Almost surely, 2^61615012 is an apocalyptic number.

It is an amenable number.

61615012 is a deficient number, since it is larger than the sum of its proper divisors (47258844).

61615012 is a wasteful number, since it uses less digits than its factorization.

61615012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149658 (or 149656 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 61615012 is about 7849.5230428352. The cubic root of 61615012 is about 394.9682439887.

Adding to 61615012 its reverse (21051616), we get a palindrome (82666628).

The spelling of 61615012 in words is "sixty-one million, six hundred fifteen thousand, twelve".