43636420464 has 160 divisors (see below), whose sum is σ = 141359952384. Its totient is φ = 11291304960.

The previous prime is 43636420459. The next prime is 43636420483. The reversal of 43636420464 is 46402463634.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137259 + ... + 325749.

Almost surely, 2^43636420464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43636420464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70679976192).

43636420464 is an abundant number, since it is smaller than the sum of its proper divisors (97723531920).

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

43636420464 is a wasteful number, since it uses less digits than its factorization.

43636420464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188575 (or 188569 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 42.

The spelling of 43636420464 in words is "forty-three billion, six hundred thirty-six million, four hundred twenty thousand, four hundred sixty-four".