253990665940 has 48 divisors (see below), whose sum is σ = 582461953920. Its totient is φ = 92266206080.

The previous prime is 253990665893. The next prime is 253990665947. The reversal of 253990665940 is 49566099352.

253990665940 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×253990665940² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253990665947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370975 + ... + 803494.

It is an arithmetic number, because the mean of its divisors is an integer number (12134624040).

Almost surely, 2^253990665940 is an apocalyptic number.

253990665940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253990665940 is an abundant number, since it is smaller than the sum of its proper divisors (328471287980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

253990665940 is a wasteful number, since it uses less digits than its factorization.

253990665940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175472 (or 1175470 counting only the distinct ones).

The product of its (nonzero) digits is 15746400, while the sum is 58.

The spelling of 253990665940 in words is "two hundred fifty-three billion, nine hundred ninety million, six hundred sixty-five thousand, nine hundred forty".