43959653472 has 192 divisors, whose sum is σ = 137231345664. Its totient is φ = 12060272640.

The previous prime is 43959653467. The next prime is 43959653503. The reversal of 43959653472 is 27435695934.

It is a super-2 number, since 2×43959653472² (a number of 22 digits) contains 22 as substring.

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, 1660822 + ... + 1687082.

It is an arithmetic number, because the mean of its divisors is an integer number (714746592).

Almost surely, 2^43959653472 is an apocalyptic number.

43959653472 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43959653472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68615672832).

43959653472 is an abundant number, since it is smaller than the sum of its proper divisors (93271692192).

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

43959653472 is a wasteful number, since it uses less digits than its factorization.

43959653472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26381 (or 26373 counting only the distinct ones).

The product of its digits is 24494400, while the sum is 57.

The spelling of 43959653472 in words is "forty-three billion, nine hundred fifty-nine million, six hundred fifty-three thousand, four hundred seventy-two".