253771381940 has 48 divisors (see below), whose sum is σ = 539193476304. Its totient is φ = 100317312000.

The previous prime is 253771381931. The next prime is 253771381943. The reversal of 253771381940 is 49183177352.

It can be written as a sum of positive squares in 8 ways, for example, as 1166632336 + 252604749604 = 34156^2 + 502598^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253771381943) 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, 976712 + ... + 1208928.

It is an arithmetic number, because the mean of its divisors is an integer number (11233197423).

Almost surely, 2^253771381940 is an apocalyptic number.

253771381940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253771381940 is an abundant number, since it is smaller than the sum of its proper divisors (285422094364).

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

253771381940 is a wasteful number, since it uses less digits than its factorization.

253771381940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232868 (or 232866 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 50.

The spelling of 253771381940 in words is "two hundred fifty-three billion, seven hundred seventy-one million, three hundred eighty-one thousand, nine hundred forty".