64515149 has 4 divisors (see below), whose sum is σ = 64821120. Its totient is φ = 64209180.

The previous prime is 64515131. The next prime is 64515173. The reversal of 64515149 is 94151546.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64515149 - 2⁸ = 64514893 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 (64515109) 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, 152669 + ... + 153090.

It is an arithmetic number, because the mean of its divisors is an integer number (16205280).

Almost surely, 2^64515149 is an apocalyptic number.

It is an amenable number.

64515149 is a deficient number, since it is larger than the sum of its proper divisors (305971).

64515149 is a wasteful number, since it uses less digits than its factorization.

64515149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305970.

The product of its digits is 21600, while the sum is 35.

The square root of 64515149 is about 8032.1322822772. The cubic root of 64515149 is about 401.0703603504.

The spelling of 64515149 in words is "sixty-four million, five hundred fifteen thousand, one hundred forty-nine".