73751732749 has 4 divisors (see below), whose sum is σ = 73753286620. Its totient is φ = 73750178880.

The previous prime is 73751732693. The next prime is 73751732753. The reversal of 73751732749 is 94723715737.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8122515625 + 65629217124 = 90125^2 + 256182^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73751732749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73751732749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73751732759) 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, 703422 + ... + 801439.

It is an arithmetic number, because the mean of its divisors is an integer number (18438321655).

Almost surely, 2^73751732749 is an apocalyptic number.

It is an amenable number.

73751732749 is a deficient number, since it is larger than the sum of its proper divisors (1553871).

73751732749 is a wasteful number, since it uses less digits than its factorization.

73751732749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553870.

The product of its digits is 7779240, while the sum is 55.

The spelling of 73751732749 in words is "seventy-three billion, seven hundred fifty-one million, seven hundred thirty-two thousand, seven hundred forty-nine".