43748038657 has 4 divisors (see below), whose sum is σ = 43755180336. Its totient is φ = 43740896980.

The previous prime is 43748038589. The next prime is 43748038681. The reversal of 43748038657 is 75683084734.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43748038657 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43748038598 and 43748038607.

It is not an unprimeable number, because it can be changed into a prime (43748038057) 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, 3561643 + ... + 3573904.

It is an arithmetic number, because the mean of its divisors is an integer number (10938795084).

Almost surely, 2^43748038657 is an apocalyptic number.

It is an amenable number.

43748038657 is a deficient number, since it is larger than the sum of its proper divisors (7141679).

43748038657 is an equidigital number, since it uses as much as digits as its factorization.

43748038657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7141678.

The product of its (nonzero) digits is 13547520, while the sum is 55.

The spelling of 43748038657 in words is "forty-three billion, seven hundred forty-eight million, thirty-eight thousand, six hundred fifty-seven".