64457646 has 32 divisors (see below), whose sum is σ = 143296128. Its totient is φ = 19163040.

The previous prime is 64457641. The next prime is 64457647. The reversal of 64457646 is 64675446.

It is a happy number.

It is a super-2 number, since 2×64457646² = 8309576255722632, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64457598 and 64457607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64457641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5716 + ... + 12711.

It is an arithmetic number, because the mean of its divisors is an integer number (4478004).

Almost surely, 2^64457646 is an apocalyptic number.

64457646 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

64457646 is an abundant number, since it is smaller than the sum of its proper divisors (78838482).

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

64457646 is a wasteful number, since it uses less digits than its factorization.

64457646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18496.

The product of its digits is 483840, while the sum is 42.

The square root of 64457646 is about 8028.5519242264. The cubic root of 64457646 is about 400.9511655840.

The spelling of 64457646 in words is "sixty-four million, four hundred fifty-seven thousand, six hundred forty-six".