1381644750725 has 24 divisors (see below), whose sum is σ = 1807819560000. Its totient is φ = 1044580890240.

The previous prime is 1381644750721. The next prime is 1381644750743. The reversal of 1381644750725 is 5270574461831.

It is not a de Polignac number, because 1381644750725 - 2² = 1381644750721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381644750721) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 3361625 + ... + 3750174.

It is an arithmetic number, because the mean of its divisors is an integer number (75325815000).

Almost surely, 2^{1381644750725} is an apocalyptic number.

It is an amenable number.

1381644750725 is a deficient number, since it is larger than the sum of its proper divisors (426174809275).

1381644750725 is a wasteful number, since it uses less digits than its factorization.

1381644750725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7112237 (or 7112232 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 53.

The spelling of 1381644750725 in words is "one trillion, three hundred eighty-one billion, six hundred forty-four million, seven hundred fifty thousand, seven hundred twenty-five".