43672645541 has 4 divisors (see below), whose sum is σ = 49911594912. Its totient is φ = 37433696172.

The previous prime is 43672645483. The next prime is 43672645553. The reversal of 43672645541 is 14554627634.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14554627634 = 2 ⋅7277313817.

It is a cyclic number.

It is not a de Polignac number, because 43672645541 - 2¹⁰ = 43672644517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43672645591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3119474675 + ... + 3119474688.

It is an arithmetic number, because the mean of its divisors is an integer number (12477898728).

Almost surely, 2^43672645541 is an apocalyptic number.

It is an amenable number.

43672645541 is a deficient number, since it is larger than the sum of its proper divisors (6238949371).

43672645541 is an equidigital number, since it uses as much as digits as its factorization.

43672645541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6238949370.

The product of its digits is 2419200, while the sum is 47.

The spelling of 43672645541 in words is "forty-three billion, six hundred seventy-two million, six hundred forty-five thousand, five hundred forty-one".