263742231725 has 144 divisors (see below), whose sum is σ = 417919389840. Its totient is φ = 163924992000.

The previous prime is 263742231721. The next prime is 263742231733. The reversal of 263742231725 is 527132247362.

It can be written as a sum of positive squares in 24 ways, for example, as 599907049 + 263142324676 = 24493^2 + 512974^2 .

It is not a de Polignac number, because 263742231725 - 2² = 263742231721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263742231721) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 77821331 + ... + 77824719.

It is an arithmetic number, because the mean of its divisors is an integer number (2902217985).

Almost surely, 2^263742231725 is an apocalyptic number.

263742231725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

263742231725 is a deficient number, since it is larger than the sum of its proper divisors (154177158115).

263742231725 is a wasteful number, since it uses less digits than its factorization.

263742231725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3568 (or 3556 counting only the distinct ones).

The product of its digits is 846720, while the sum is 44.

The spelling of 263742231725 in words is "two hundred sixty-three billion, seven hundred forty-two million, two hundred thirty-one thousand, seven hundred twenty-five".