265497735940 has 24 divisors (see below), whose sum is σ = 558978540120. Its totient is φ = 105926085888.

The previous prime is 265497735913. The next prime is 265497735983. The reversal of 265497735940 is 49537794562.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10446475264 + 255051260676 = 102208^2 + 505026^2 .

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, 17055057 + ... + 17070616.

It is an arithmetic number, because the mean of its divisors is an integer number (23290772505).

Almost surely, 2^265497735940 is an apocalyptic number.

265497735940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265497735940 is an abundant number, since it is smaller than the sum of its proper divisors (293480804180).

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

265497735940 is a wasteful number, since it uses less digits than its factorization.

265497735940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34126071 (or 34126069 counting only the distinct ones).

The product of its (nonzero) digits is 57153600, while the sum is 61.

The spelling of 265497735940 in words is "two hundred sixty-five billion, four hundred ninety-seven million, seven hundred thirty-five thousand, nine hundred forty".