1565263266640 has 40 divisors (see below), whose sum is σ = 3756631845888. Its totient is φ = 605908360320.

The previous prime is 1565263266599. The next prime is 1565263266643. The reversal of 1565263266640 is 466623625651.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1565263266643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315574792 + ... + 315579751.

Almost surely, 2^{1565263266640} is an apocalyptic number.

1565263266640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1565263266640 is an abundant number, since it is smaller than the sum of its proper divisors (2191368579248).

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

1565263266640 is a wasteful number, since it uses less digits than its factorization.

1565263266640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631154587 (or 631154581 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 52.

The spelling of 1565263266640 in words is "one trillion, five hundred sixty-five billion, two hundred sixty-three million, two hundred sixty-six thousand, six hundred forty".