61578312 has 32 divisors (see below), whose sum is σ = 154846080. Its totient is φ = 20406080.

The previous prime is 61578289. The next prime is 61578317. The reversal of 61578312 is 21387516.

61578312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (61578317) 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 7 ways as a sum of consecutive naturals, for example, 3264 + ... + 11567.

It is an arithmetic number, because the mean of its divisors is an integer number (4838940).

Almost surely, 2^61578312 is an apocalyptic number.

It is an amenable number.

61578312 is an abundant number, since it is smaller than the sum of its proper divisors (93267768).

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

61578312 is a wasteful number, since it uses less digits than its factorization.

61578312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15013 (or 15009 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 61578312 is about 7847.1849729696. The cubic root of 61578312 is about 394.8898095672.

The spelling of 61578312 in words is "sixty-one million, five hundred seventy-eight thousand, three hundred twelve".