64521023402 has 8 divisors (see below), whose sum is σ = 105579856512. Its totient is φ = 29327737900.

The previous prime is 64521023381. The next prime is 64521023407. The reversal of 64521023402 is 20432012546.

64521023402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (64521023407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1466386874 + ... + 1466386917.

It is an arithmetic number, because the mean of its divisors is an integer number (13197482064).

Almost surely, 2^64521023402 is an apocalyptic number.

64521023402 is a deficient number, since it is larger than the sum of its proper divisors (41058833110).

64521023402 is a wasteful number, since it uses less digits than its factorization.

64521023402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2932773804.

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

Adding to 64521023402 its reverse (20432012546), we get a palindrome (84953035948).

The spelling of 64521023402 in words is "sixty-four billion, five hundred twenty-one million, twenty-three thousand, four hundred two".