1387751252645 has 8 divisors (see below), whose sum is σ = 1665346357656. Its totient is φ = 1110171099136.

The previous prime is 1387751252639. The next prime is 1387751252653. The reversal of 1387751252645 is 5462521577831.

It can be written as a sum of positive squares in 4 ways, for example, as 428011659076 + 959739593569 = 654226^2 + 979663^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1387751252645 - 2⁶ = 1387751252581 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 3532652 + ... + 3905781.

It is an arithmetic number, because the mean of its divisors is an integer number (208168294707).

Almost surely, 2^{1387751252645} is an apocalyptic number.

It is an amenable number.

1387751252645 is a deficient number, since it is larger than the sum of its proper divisors (277595105011).

1387751252645 is an equidigital number, since it uses as much as digits as its factorization.

1387751252645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7475751.

The product of its digits is 14112000, while the sum is 56.

The spelling of 1387751252645 in words is "one trillion, three hundred eighty-seven billion, seven hundred fifty-one million, two hundred fifty-two thousand, six hundred forty-five".