42749549537 has 4 divisors (see below), whose sum is σ = 44128567296. Its totient is φ = 41370531780.

The previous prime is 42749549527. The next prime is 42749549551. The reversal of 42749549537 is 73594594724.

42749549537 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 42749549537 - 2²⁶ = 42682440673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42749549527) 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, 689508833 + ... + 689508894.

It is an arithmetic number, because the mean of its divisors is an integer number (11032141824).

Almost surely, 2^42749549537 is an apocalyptic number.

It is an amenable number.

42749549537 is a deficient number, since it is larger than the sum of its proper divisors (1379017759).

42749549537 is a wasteful number, since it uses less digits than its factorization.

42749549537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379017758.

The product of its digits is 38102400, while the sum is 59.

The spelling of 42749549537 in words is "forty-two billion, seven hundred forty-nine million, five hundred forty-nine thousand, five hundred thirty-seven".