43420621264 has 80 divisors (see below), whose sum is σ = 93830244480. Its totient is φ = 19344199680.

The previous prime is 43420621259. The next prime is 43420621267. The reversal of 43420621264 is 46212602434.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43420621267) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 12365269 + ... + 12368779.

It is an arithmetic number, because the mean of its divisors is an integer number (1172878056).

Almost surely, 2^43420621264 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 43420621264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46915122240).

43420621264 is an abundant number, since it is smaller than the sum of its proper divisors (50409623216).

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

43420621264 is a wasteful number, since it uses less digits than its factorization.

43420621264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5948 (or 5942 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

The spelling of 43420621264 in words is "forty-three billion, four hundred twenty million, six hundred twenty-one thousand, two hundred sixty-four".