43551390960 has 640 divisors, whose sum is σ = 187779409920. Its totient is φ = 9013248000.

The previous prime is 43551390937. The next prime is 43551390973. The reversal of 43551390960 is 6909315534.

43551390960 is a `hidden beast` number, since 4 + 3 + 551 + 3 + 9 + 0 + 96 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 66693994 + ... + 66694646.

It is an arithmetic number, because the mean of its divisors is an integer number (293405328).

Almost surely, 2^43551390960 is an apocalyptic number.

43551390960 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 43551390960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93889704960).

43551390960 is an abundant number, since it is smaller than the sum of its proper divisors (144228018960).

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

43551390960 is a wasteful number, since it uses less digits than its factorization.

43551390960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094 (or 1082 counting only the distinct ones).

The product of its (nonzero) digits is 437400, while the sum is 45.

The spelling of 43551390960 in words is "forty-three billion, five hundred fifty-one million, three hundred ninety thousand, nine hundred sixty".