1248640865476 has 81 divisors (see below), whose sum is σ = 2300638275117. Its totient is φ = 592950932640.

The previous prime is 1248640865471. The next prime is 1248640865497. The reversal of 1248640865476 is 6745680468421.

The square root of 1248640865476 is 1117426.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 82154463876 + 1166486401600 = 286626^2 + 1080040^2 .

It is not an unprimeable number, because it can be changed into a prime (1248640865471) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4641787470 + ... + 4641787738.

Almost surely, 2^{1248640865476} is an apocalyptic number.

1248640865476 is the 1117426-th square number.

It is an amenable number.

1248640865476 is a deficient number, since it is larger than the sum of its proper divisors (1051997409641).

1248640865476 is an frugal number, since it uses more digits than its factorization.

1248640865476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738 (or 369 counting only the distinct ones).

The product of its (nonzero) digits is 61931520, while the sum is 61.

It can be divided in two parts, 1248640 and 865476, that added together give a square (2114116 = 1454²).

The spelling of 1248640865476 in words is "one trillion, two hundred forty-eight billion, six hundred forty million, eight hundred sixty-five thousand, four hundred seventy-six".