64451432 has 8 divisors (see below), whose sum is σ = 120846450. Its totient is φ = 32225712.

The previous prime is 64451417. The next prime is 64451459. The reversal of 64451432 is 23415446.

It can be written as a sum of positive squares in only one way, i.e., 62948356 + 1503076 = 7934^2 + 1226^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 64451395 and 64451404.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4028207 + ... + 4028222.

Almost surely, 2^64451432 is an apocalyptic number.

It is an amenable number.

64451432 is a deficient number, since it is larger than the sum of its proper divisors (56395018).

64451432 is a wasteful number, since it uses less digits than its factorization.

64451432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8056435 (or 8056431 counting only the distinct ones).

The product of its digits is 11520, while the sum is 29.

The square root of 64451432 is about 8028.1649210763. The cubic root of 64451432 is about 400.9382806858.

Adding to 64451432 its reverse (23415446), we get a palindrome (87866878).

The spelling of 64451432 in words is "sixty-four million, four hundred fifty-one thousand, four hundred thirty-two".