64631061 has 48 divisors (see below), whose sum is σ = 107080960. Its totient is φ = 38491200.

The previous prime is 64631051. The next prime is 64631069. The reversal of 64631061 is 16013646.

64631061 is a `hidden beast` number, since 646 + 3 + 10 + 6 + 1 = 666.

64631061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64631061 - 2⁵ = 64631029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64631069) 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 47 ways as a sum of consecutive naturals, for example, 238356 + ... + 238626.

Almost surely, 2^64631061 is an apocalyptic number.

It is an amenable number.

64631061 is a deficient number, since it is larger than the sum of its proper divisors (42449899).

64631061 is a wasteful number, since it uses less digits than its factorization.

64631061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375 (or 358 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 64631061 is about 8039.3445628360. The cubic root of 64631061 is about 401.3104127746.

The spelling of 64631061 in words is "sixty-four million, six hundred thirty-one thousand, sixty-one".