1390681572737 has 4 divisors (see below), whose sum is σ = 1395851392980. Its totient is φ = 1385511752496.

The previous prime is 1390681572703. The next prime is 1390681572793. The reversal of 1390681572737 is 7372751860931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 795193093696 + 595488479041 = 891736^2 + 771679^2 .

It is a cyclic number.

It is not a de Polignac number, because 1390681572737 - 2¹⁴ = 1390681556353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1390681572337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2584909718 + ... + 2584910255.

It is an arithmetic number, because the mean of its divisors is an integer number (348962848245).

Almost surely, 2^{1390681572737} is an apocalyptic number.

It is an amenable number.

1390681572737 is a deficient number, since it is larger than the sum of its proper divisors (5169820243).

1390681572737 is an equidigital number, since it uses as much as digits as its factorization.

1390681572737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5169820242.

The product of its (nonzero) digits is 13335840, while the sum is 59.

The spelling of 1390681572737 in words is "one trillion, three hundred ninety billion, six hundred eighty-one million, five hundred seventy-two thousand, seven hundred thirty-seven".