64436043652 has 24 divisors (see below), whose sum is σ = 113563296000. Its totient is φ = 31990045920.

The previous prime is 64436043533. The next prime is 64436043719. The reversal of 64436043652 is 25634063446.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 64436043599 and 64436043608.

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, 311277 + ... + 475147.

It is an arithmetic number, because the mean of its divisors is an integer number (4731804000).

Almost surely, 2^64436043652 is an apocalyptic number.

It is an amenable number.

64436043652 is a deficient number, since it is larger than the sum of its proper divisors (49127252348).

64436043652 is a wasteful number, since it uses less digits than its factorization.

64436043652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164571 (or 164569 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 43.

The spelling of 64436043652 in words is "sixty-four billion, four hundred thirty-six million, forty-three thousand, six hundred fifty-two".