64148749 has 8 divisors (see below), whose sum is σ = 74873088. Its totient is φ = 53814480.

The previous prime is 64148741. The next prime is 64148801. The reversal of 64148749 is 94784146.

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

It is a cyclic number.

It is not a de Polignac number, because 64148749 - 2³ = 64148741 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 (64148741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97162 + ... + 97819.

It is an arithmetic number, because the mean of its divisors is an integer number (9359136).

Almost surely, 2^64148749 is an apocalyptic number.

It is an amenable number.

64148749 is a deficient number, since it is larger than the sum of its proper divisors (10724339).

64148749 is a wasteful number, since it uses less digits than its factorization.

64148749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195035.

The product of its digits is 193536, while the sum is 43.

The square root of 64148749 is about 8009.2914168483. The cubic root of 64148749 is about 400.3096539742.

The spelling of 64148749 in words is "sixty-four million, one hundred forty-eight thousand, seven hundred forty-nine".