43642734870 has 128 divisors (see below), whose sum is σ = 121805632512. Its totient is φ = 9800870400.

The previous prime is 43642734851. The next prime is 43642734907. The reversal of 43642734870 is 7843724634.

It is a super-2 number, since 2×43642734870² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17689377 + ... + 17691843.

It is an arithmetic number, because the mean of its divisors is an integer number (951606504).

Almost surely, 2^43642734870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43642734870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60902816256).

43642734870 is an abundant number, since it is smaller than the sum of its proper divisors (78162897642).

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

43642734870 is a wasteful number, since it uses less digits than its factorization.

43642734870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3926.

The product of its (nonzero) digits is 2709504, while the sum is 48.

The spelling of 43642734870 in words is "forty-three billion, six hundred forty-two million, seven hundred thirty-four thousand, eight hundred seventy".