64647542 has 8 divisors (see below), whose sum is σ = 97012632. Its totient is φ = 32310000.

The previous prime is 64647511. The next prime is 64647551. The reversal of 64647542 is 24574646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 64647496 and 64647505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 617 + ... + 11387.

It is an arithmetic number, because the mean of its divisors is an integer number (12126579).

Almost surely, 2^64647542 is an apocalyptic number.

64647542 is a deficient number, since it is larger than the sum of its proper divisors (32365090).

64647542 is a wasteful number, since it uses less digits than its factorization.

64647542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13774.

The product of its digits is 161280, while the sum is 38.

The square root of 64647542 is about 8040.3695188716. The cubic root of 64647542 is about 401.3445214250.

The spelling of 64647542 in words is "sixty-four million, six hundred forty-seven thousand, five hundred forty-two".