61431064 has 16 divisors (see below), whose sum is σ = 121959000. Its totient is φ = 28908672.

The previous prime is 61431059. The next prime is 61431067. The reversal of 61431064 is 46013416.

61431064 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61431067) 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, 225714 + ... + 225985.

Almost surely, 2^61431064 is an apocalyptic number.

It is an amenable number.

61431064 is a deficient number, since it is larger than the sum of its proper divisors (60527936).

61431064 is a wasteful number, since it uses less digits than its factorization.

61431064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451722 (or 451718 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 61431064 is about 7837.7971395029. The cubic root of 61431064 is about 394.5748006953.

The spelling of 61431064 in words is "sixty-one million, four hundred thirty-one thousand, sixty-four".