43620641620 has 48 divisors (see below), whose sum is σ = 94599178128. Its totient is φ = 16882836480.

The previous prime is 43620641587. The next prime is 43620641621. The reversal of 43620641620 is 2614602634.

It can be written as a sum of positive squares in 8 ways, for example, as 6712852624 + 36907788996 = 81932^2 + 192114^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43620641621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28897 + ... + 296776.

It is an arithmetic number, because the mean of its divisors is an integer number (1970816211).

Almost surely, 2^43620641620 is an apocalyptic number.

It is an amenable number.

43620641620 is an abundant number, since it is smaller than the sum of its proper divisors (50978536508).

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

43620641620 is a wasteful number, since it uses less digits than its factorization.

43620641620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325900 (or 325898 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

The spelling of 43620641620 in words is "forty-three billion, six hundred twenty million, six hundred forty-one thousand, six hundred twenty".