1265464816340 has 48 divisors (see below), whose sum is σ = 2664325730304. Its totient is φ = 504882105600.

The previous prime is 1265464816333. The next prime is 1265464816381. The reversal of 1265464816340 is 436184645621.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24753005 + ... + 24804075.

It is an arithmetic number, because the mean of its divisors is an integer number (55506786048).

Almost surely, 2^{1265464816340} is an apocalyptic number.

1265464816340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1265464816340 is an abundant number, since it is smaller than the sum of its proper divisors (1398860913964).

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

1265464816340 is a wasteful number, since it uses less digits than its factorization.

1265464816340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54248 (or 54246 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 50.

The spelling of 1265464816340 in words is "one trillion, two hundred sixty-five billion, four hundred sixty-four million, eight hundred sixteen thousand, three hundred forty".