64151447 has 4 divisors (see below), whose sum is σ = 64924440. Its totient is φ = 63378456.

The previous prime is 64151401. The next prime is 64151459. The reversal of 64151447 is 74415146.

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

It is a cyclic number.

It is not a de Polignac number, because 64151447 - 2¹² = 64147351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64151497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386372 + ... + 386537.

It is an arithmetic number, because the mean of its divisors is an integer number (16231110).

Almost surely, 2^64151447 is an apocalyptic number.

64151447 is a deficient number, since it is larger than the sum of its proper divisors (772993).

64151447 is an equidigital number, since it uses as much as digits as its factorization.

64151447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772992.

The product of its digits is 13440, while the sum is 32.

The square root of 64151447 is about 8009.4598444589. The cubic root of 64151447 is about 400.3152660364.

The spelling of 64151447 in words is "sixty-four million, one hundred fifty-one thousand, four hundred forty-seven".