43640162740 has 96 divisors (see below), whose sum is σ = 96494872320. Its totient is φ = 16546523136.

The previous prime is 43640162737. The next prime is 43640162759. The reversal of 43640162740 is 4726104634.

It is a super-3 number, since 3×43640162740³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43640162740.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42825951 + ... + 42826969.

It is an arithmetic number, because the mean of its divisors is an integer number (1005154920).

Almost surely, 2^43640162740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43640162740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48247436160).

43640162740 is an abundant number, since it is smaller than the sum of its proper divisors (52854709580).

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

43640162740 is a wasteful number, since it uses less digits than its factorization.

43640162740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1801 (or 1799 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 37.

The spelling of 43640162740 in words is "forty-three billion, six hundred forty million, one hundred sixty-two thousand, seven hundred forty".