74749237549 has 4 divisors (see below), whose sum is σ = 85427700064. Its totient is φ = 64070775036.

The previous prime is 74749237529. The next prime is 74749237567. The reversal of 74749237549 is 94573294747.

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-74749237549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74749237529) 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, 5339231247 + ... + 5339231260.

It is an arithmetic number, because the mean of its divisors is an integer number (21356925016).

Almost surely, 2^74749237549 is an apocalyptic number.

It is an amenable number.

74749237549 is a deficient number, since it is larger than the sum of its proper divisors (10678462515).

74749237549 is a wasteful number, since it uses less digits than its factorization.

74749237549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10678462514.

The product of its digits is 53343360, while the sum is 61.

The spelling of 74749237549 in words is "seventy-four billion, seven hundred forty-nine million, two hundred thirty-seven thousand, five hundred forty-nine".