64156646 has 4 divisors (see below), whose sum is σ = 96234972. Its totient is φ = 32078322.

The previous prime is 64156633. The next prime is 64156661. The reversal of 64156646 is 64665146.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 16039160 + ... + 16039163.

It is an arithmetic number, because the mean of its divisors is an integer number (24058743).

Almost surely, 2^64156646 is an apocalyptic number.

64156646 is a deficient number, since it is larger than the sum of its proper divisors (32078326).

64156646 is a wasteful number, since it uses less digits than its factorization.

64156646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32078325.

The product of its digits is 103680, while the sum is 38.

The square root of 64156646 is about 8009.7843916051. The cubic root of 64156646 is about 400.3260799408.

The spelling of 64156646 in words is "sixty-four million, one hundred fifty-six thousand, six hundred forty-six".