64444442502 has 32 divisors (see below), whose sum is σ = 140616403200. Its totient is φ = 19527181920.

The previous prime is 64444442501. The next prime is 64444442519. The reversal of 64444442502 is 20524444446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64444442501) 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, 1174308 + ... + 1227960.

It is an arithmetic number, because the mean of its divisors is an integer number (4394262600).

Almost surely, 2^64444442502 is an apocalyptic number.

64444442502 is an abundant number, since it is smaller than the sum of its proper divisors (76171960698).

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

64444442502 is a wasteful number, since it uses less digits than its factorization.

64444442502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71868.

The product of its (nonzero) digits is 491520, while the sum is 39.

Adding to 64444442502 its reverse (20524444446), we get a palindrome (84968886948).

The spelling of 64444442502 in words is "sixty-four billion, four hundred forty-four million, four hundred forty-two thousand, five hundred two".