64518402 has 32 divisors (see below), whose sum is σ = 139769280. Its totient is φ = 19736640.

The previous prime is 64518401. The next prime is 64518407. The reversal of 64518402 is 20481546.

It is a self number, because there is not a number n which added to its sum of digits gives 64518402.

It is not an unprimeable number, because it can be changed into a prime (64518401) 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, 11652 + ... + 16272.

It is an arithmetic number, because the mean of its divisors is an integer number (4367790).

Almost surely, 2^64518402 is an apocalyptic number.

64518402 is an abundant number, since it is smaller than the sum of its proper divisors (75250878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64518402 is a wasteful number, since it uses less digits than its factorization.

64518402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4818.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 64518402 is about 8032.3347788797. The cubic root of 64518402 is about 401.0771011959.

Adding to 64518402 its reverse (20481546), we get a palindrome (84999948).

The spelling of 64518402 in words is "sixty-four million, five hundred eighteen thousand, four hundred two".