753740724221 has 4 divisors (see below), whose sum is σ = 753908487612. Its totient is φ = 753572960832.

The previous prime is 753740724211. The next prime is 753740724239. The reversal of 753740724221 is 122427047357.

It is a happy number.

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 740141899225 + 13598824996 = 860315^2 + 116614^2 .

It is a cyclic number.

It is not a de Polignac number, because 753740724221 - 2⁶ = 753740724157 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 (753740724211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83874956 + ... + 83883941.

It is an arithmetic number, because the mean of its divisors is an integer number (188477121903).

Almost surely, 2^753740724221 is an apocalyptic number.

It is an amenable number.

753740724221 is a deficient number, since it is larger than the sum of its proper divisors (167763391).

753740724221 is a wasteful number, since it uses less digits than its factorization.

753740724221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167763390.

The product of its (nonzero) digits is 658560, while the sum is 44.

The spelling of 753740724221 in words is "seven hundred fifty-three billion, seven hundred forty million, seven hundred twenty-four thousand, two hundred twenty-one".