43748801646 has 64 divisors (see below), whose sum is σ = 98843314176. Its totient is φ = 12788899200.

The previous prime is 43748801597. The next prime is 43748801659. The reversal of 43748801646 is 64610884734.

It is a super-2 number, since 2×43748801646² (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, 614856 + ... + 682308.

It is an arithmetic number, because the mean of its divisors is an integer number (1544426784).

Almost surely, 2^43748801646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43748801646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49421657088).

43748801646 is an abundant number, since it is smaller than the sum of its proper divisors (55094512530).

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

43748801646 is a wasteful number, since it uses less digits than its factorization.

43748801646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67817.

The product of its (nonzero) digits is 3096576, while the sum is 51.

The spelling of 43748801646 in words is "forty-three billion, seven hundred forty-eight million, eight hundred one thousand, six hundred forty-six".