64505451 has 8 divisors (see below), whose sum is σ = 88781824. Its totient is φ = 41616360.

The previous prime is 64505449. The next prime is 64505453. The reversal of 64505451 is 15450546.

It is an interprime number because it is at equal distance from previous prime (64505449) and next prime (64505453).

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

It is not a de Polignac number, because 64505451 - 2¹ = 64505449 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (64505453) 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, 346711 + ... + 346896.

It is an arithmetic number, because the mean of its divisors is an integer number (11097728).

Almost surely, 2^64505451 is an apocalyptic number.

64505451 is a deficient number, since it is larger than the sum of its proper divisors (24276373).

64505451 is a wasteful number, since it uses less digits than its factorization.

64505451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693641.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 64505451 is about 8031.5285593715. The cubic root of 64505451 is about 401.0502628729.

Adding to 64505451 its reverse (15450546), we get a palindrome (79955997).

It can be divided in two parts, 6450545 and 1, that added together give a palindrome (6450546).

The spelling of 64505451 in words is "sixty-four million, five hundred five thousand, four hundred fifty-one".