43537668444 has 72 divisors (see below), whose sum is σ = 110493102720. Its totient is φ = 14454720000.

The previous prime is 43537668407. The next prime is 43537668451. The reversal of 43537668444 is 44486673534.

43537668444 is a `hidden beast` number, since 4 + 3 + 537 + 6 + 68 + 4 + 44 = 666.

It is a super-2 number, since 2×43537668444² (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 23 ways as a sum of consecutive naturals, for example, 10361544 + ... + 10365744.

Almost surely, 2^43537668444 is an apocalyptic number.

It is an amenable number.

43537668444 is an abundant number, since it is smaller than the sum of its proper divisors (66955434276).

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

43537668444 is a wasteful number, since it uses less digits than its factorization.

43537668444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5291 (or 5286 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 54.

The spelling of 43537668444 in words is "forty-three billion, five hundred thirty-seven million, six hundred sixty-eight thousand, four hundred forty-four".