43664172690 has 32 divisors (see below), whose sum is σ = 106358109120. Its totient is φ = 11469991104.

The previous prime is 43664172679. The next prime is 43664172709. The reversal of 43664172690 is 9627146634.

It is a super-2 number, since 2×43664172690² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10859725 + ... + 10863744.

It is an arithmetic number, because the mean of its divisors is an integer number (3323690910).

Almost surely, 2^43664172690 is an apocalyptic number.

43664172690 is an abundant number, since it is smaller than the sum of its proper divisors (62693936430).

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

43664172690 is a wasteful number, since it uses less digits than its factorization.

43664172690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21723546.

The product of its (nonzero) digits is 1306368, while the sum is 48.

The spelling of 43664172690 in words is "forty-three billion, six hundred sixty-four million, one hundred seventy-two thousand, six hundred ninety".