64451949 has 16 divisors (see below), whose sum is σ = 89147520. Its totient is φ = 41370560.

The previous prime is 64451927. The next prime is 64451953. The reversal of 64451949 is 94915446.

It is a cyclic number.

It is not a de Polignac number, because 64451949 - 2⁸ = 64451693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64451949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64451749) 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, 39304 + ... + 40910.

It is an arithmetic number, because the mean of its divisors is an integer number (5571720).

Almost surely, 2^64451949 is an apocalyptic number.

It is an amenable number.

64451949 is a deficient number, since it is larger than the sum of its proper divisors (24695571).

64451949 is a wasteful number, since it uses less digits than its factorization.

64451949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100.

The product of its digits is 155520, while the sum is 42.

The square root of 64451949 is about 8028.1971201509. The cubic root of 64451949 is about 400.9393527310.

The spelling of 64451949 in words is "sixty-four million, four hundred fifty-one thousand, nine hundred forty-nine".