265630471040 has 512 divisors, whose sum is σ = 737821716480. Its totient is φ = 90574848000.

The previous prime is 265630471039. The next prime is 265630471061. The reversal of 265630471040 is 40174036562.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 265630470985 and 265630471003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 980186105 + ... + 980186375.

It is an arithmetic number, because the mean of its divisors is an integer number (1441058040).

Almost surely, 2^265630471040 is an apocalyptic number.

265630471040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265630471040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (368910858240).

265630471040 is an abundant number, since it is smaller than the sum of its proper divisors (472191245440).

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

265630471040 is a wasteful number, since it uses less digits than its factorization.

265630471040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 38.

The spelling of 265630471040 in words is "two hundred sixty-five billion, six hundred thirty million, four hundred seventy-one thousand, forty".