43640149837 has 16 divisors (see below), whose sum is σ = 47181761280. Its totient is φ = 40240076800.

The previous prime is 43640149831. The next prime is 43640149849. The reversal of 43640149837 is 73894104634.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43640149837 is a prime.

It is a super-3 number, since 3×43640149837³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43640149831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 376512 + ... + 478582.

It is an arithmetic number, because the mean of its divisors is an integer number (2948860080).

Almost surely, 2^43640149837 is an apocalyptic number.

It is an amenable number.

43640149837 is a deficient number, since it is larger than the sum of its proper divisors (3541611443).

43640149837 is a wasteful number, since it uses less digits than its factorization.

43640149837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102764.

The product of its (nonzero) digits is 1741824, while the sum is 49.

The spelling of 43640149837 in words is "forty-three billion, six hundred forty million, one hundred forty-nine thousand, eight hundred thirty-seven".