1391680293025 has 81 divisors (see below), whose sum is σ = 1926370955019. Its totient is φ = 996606336000.

The previous prime is 1391680293023. The next prime is 1391680293071. The reversal of 1391680293025 is 5203920861931.

The square root of 1391680293025 is 1179695.

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

It can be written as a sum of positive squares in 13 ways, for example, as 978945999889 + 412734293136 = 989417^2 + 642444^2 .

It is not a de Polignac number, because 1391680293025 - 2¹ = 1391680293023 is a prime.

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 1391680293025.

It is not an unprimeable number, because it can be changed into a prime (1391680293023) 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 80 ways as a sum of consecutive naturals, for example, 5774606905 + ... + 5774607145.

Almost surely, 2^{1391680293025} is an apocalyptic number.

1391680293025 is the 1179695-th square number.

1391680293025 is the 589848-th centered octagonal number.

It is an amenable number.

1391680293025 is a deficient number, since it is larger than the sum of its proper divisors (534690661994).

1391680293025 is an frugal number, since it uses more digits than its factorization.

1391680293025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692 (or 346 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 49.

Multiplying 1391680293025 by its sum of digits (49), we get a square (68192334358225 = 8257865²).

The spelling of 1391680293025 in words is "one trillion, three hundred ninety-one billion, six hundred eighty million, two hundred ninety-three thousand, twenty-five".