1387420140544 has 33 divisors (see below), whose sum is σ = 2773560728677. Its totient is φ = 693691224064.

The previous prime is 1387420140541. The next prime is 1387420140571. The reversal of 1387420140544 is 4450410247831.

The square root of 1387420140544 is 1177888.

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., 511923078144 + 875497062400 = 715488^2 + 935680^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1387420140544.

It is not an unprimeable number, because it can be changed into a prime (1387420140541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 37674012 + ... + 37710820.

Almost surely, 2^{1387420140544} is an apocalyptic number.

1387420140544 is the 1177888-th square number.

It is an amenable number.

1387420140544 is a deficient number, since it is larger than the sum of its proper divisors (1386140588133).

1387420140544 is an frugal number, since it uses more digits than its factorization.

1387420140544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73638 (or 36811 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 43.

The spelling of 1387420140544 in words is "one trillion, three hundred eighty-seven billion, four hundred twenty million, one hundred forty thousand, five hundred forty-four".