64071749 has 16 divisors (see below), whose sum is σ = 74877696. Its totient is φ = 53692800.

The previous prime is 64071739. The next prime is 64071779. The reversal of 64071749 is 94717046.

It is a de Polignac number, because none of the positive numbers 2^k-64071749 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 (64071739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67619 + ... + 68559.

It is an arithmetic number, because the mean of its divisors is an integer number (4679856).

Almost surely, 2^64071749 is an apocalyptic number.

It is an amenable number.

64071749 is a deficient number, since it is larger than the sum of its proper divisors (10805947).

64071749 is a wasteful number, since it uses less digits than its factorization.

64071749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 64071749 is about 8004.4830563878. The cubic root of 64071749 is about 400.1494212596.

The spelling of 64071749 in words is "sixty-four million, seventy-one thousand, seven hundred forty-nine".