64435749 has 16 divisors (see below), whose sum is σ = 98317440. Its totient is φ = 36771840.

The previous prime is 64435741. The next prime is 64435769. The reversal of 64435749 is 94753446.

It is not a de Polignac number, because 64435749 - 2³ = 64435741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64435749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64435741) 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, 19669 + ... + 22709.

It is an arithmetic number, because the mean of its divisors is an integer number (6144840).

Almost surely, 2^64435749 is an apocalyptic number.

It is an amenable number.

64435749 is a deficient number, since it is larger than the sum of its proper divisors (33881691).

64435749 is a wasteful number, since it uses less digits than its factorization.

64435749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4060.

The product of its digits is 362880, while the sum is 42.

The square root of 64435749 is about 8027.1881129073. The cubic root of 64435749 is about 400.9057578753.

The spelling of 64435749 in words is "sixty-four million, four hundred thirty-five thousand, seven hundred forty-nine".