64020535436 has 24 divisors (see below), whose sum is σ = 131622640464. Its totient is φ = 26861762880.

The previous prime is 64020535421. The next prime is 64020535441. The reversal of 64020535436 is 63453502046.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 64020535436.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55961435 + ... + 55962578.

It is an arithmetic number, because the mean of its divisors is an integer number (5484276686).

Almost surely, 2^64020535436 is an apocalyptic number.

It is an amenable number.

64020535436 is an abundant number, since it is smaller than the sum of its proper divisors (67602105028).

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

64020535436 is a wasteful number, since it uses less digits than its factorization.

64020535436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111924041 (or 111924039 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 38.

The spelling of 64020535436 in words is "sixty-four billion, twenty million, five hundred thirty-five thousand, four hundred thirty-six".