253109721590 has 16 divisors (see below), whose sum is σ = 497015453520. Its totient is φ = 92039898720.

The previous prime is 253109721559. The next prime is 253109721629. The reversal of 253109721590 is 95127901352.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1150498625 + ... + 1150498844.

It is an arithmetic number, because the mean of its divisors is an integer number (31063465845).

Almost surely, 2^253109721590 is an apocalyptic number.

253109721590 is a deficient number, since it is larger than the sum of its proper divisors (243905731930).

253109721590 is a wasteful number, since it uses less digits than its factorization.

253109721590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2300997487.

The product of its (nonzero) digits is 170100, while the sum is 44.

The spelling of 253109721590 in words is "two hundred fifty-three billion, one hundred nine million, seven hundred twenty-one thousand, five hundred ninety".