1265830404640 has 48 divisors (see below), whose sum is σ = 2990628950400. Its totient is φ = 506314448640.

The previous prime is 1265830404623. The next prime is 1265830404659. The reversal of 1265830404640 is 464040385621.

It is a super-2 number, since 2×1265830404640² (a number of 25 digits) contains 22 as substring.

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, 5057161 + ... + 5301559.

It is an arithmetic number, because the mean of its divisors is an integer number (62304769800).

Almost surely, 2^{1265830404640} is an apocalyptic number.

1265830404640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1265830404640 is an abundant number, since it is smaller than the sum of its proper divisors (1724798545760).

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

1265830404640 is a wasteful number, since it uses less digits than its factorization.

1265830404640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276785 (or 276777 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 43.

The spelling of 1265830404640 in words is "one trillion, two hundred sixty-five billion, eight hundred thirty million, four hundred four thousand, six hundred forty".