253721879332 has 6 divisors (see below), whose sum is σ = 444013288838. Its totient is φ = 126860939664.

The previous prime is 253721879317. The next prime is 253721879353. The reversal of 253721879332 is 233978127352.

It can be written as a sum of positive squares in only one way, i.e., 221215952896 + 32505926436 = 470336^2 + 180294^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 253721879332.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31715234913 + ... + 31715234920.

Almost surely, 2^253721879332 is an apocalyptic number.

It is an amenable number.

253721879332 is a deficient number, since it is larger than the sum of its proper divisors (190291409506).

253721879332 is a wasteful number, since it uses less digits than its factorization.

253721879332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63430469837 (or 63430469835 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 52.

The spelling of 253721879332 in words is "two hundred fifty-three billion, seven hundred twenty-one million, eight hundred seventy-nine thousand, three hundred thirty-two".