43361377920 has 768 divisors, whose sum is σ = 181089820800. Its totient is φ = 9775890432.

The previous prime is 43361377897. The next prime is 43361377933. The reversal of 43361377920 is 2977316334.

It is a happy number.

43361377920 is a `hidden beast` number, since 4 + 3 + 3 + 613 + 7 + 7 + 9 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 70277452 + ... + 70278068.

Almost surely, 2^43361377920 is an apocalyptic number.

43361377920 is a gapful number since it is divisible by the number (40) 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 43361377920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90544910400).

43361377920 is an abundant number, since it is smaller than the sum of its proper divisors (137728442880).

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

43361377920 is a wasteful number, since it uses less digits than its factorization.

43361377920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742 (or 717 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 45.

The spelling of 43361377920 in words is "forty-three billion, three hundred sixty-one million, three hundred seventy-seven thousand, nine hundred twenty".