265132435970640 has 640 divisors, whose sum is σ = 979465172216832. Its totient is φ = 58064728227840.

The previous prime is 265132435970621. The next prime is 265132435970653. The reversal of 265132435970640 is 46079534231562.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2908607304 + ... + 2908698456.

Almost surely, 2^{265132435970640} is an apocalyptic number.

265132435970640 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 265132435970640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (489732586108416).

265132435970640 is an abundant number, since it is smaller than the sum of its proper divisors (714332736246192).

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

265132435970640 is a wasteful number, since it uses less digits than its factorization.

265132435970640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91927 (or 91921 counting only the distinct ones).

The product of its (nonzero) digits is 32659200, while the sum is 57.

The spelling of 265132435970640 in words is "two hundred sixty-five trillion, one hundred thirty-two billion, four hundred thirty-five million, nine hundred seventy thousand, six hundred forty".