43672401664 has 72 divisors (see below), whose sum is σ = 93896781440. Its totient is φ = 20205739008.

The previous prime is 43672401637. The next prime is 43672401667. The reversal of 43672401664 is 46610427634.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a self number, because there is not a number n which added to its sum of digits gives 43672401664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43672401667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104749 + ... + 313555.

Almost surely, 2^43672401664 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 43672401664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46948390720).

43672401664 is an abundant number, since it is smaller than the sum of its proper divisors (50224379776).

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

43672401664 is a wasteful number, since it uses less digits than its factorization.

43672401664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208885 (or 208871 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 43.

The spelling of 43672401664 in words is "forty-three billion, six hundred seventy-two million, four hundred one thousand, six hundred sixty-four".