1970780784025 has 9 divisors (see below), whose sum is σ = 2443776876061. Its totient is φ = 1576619011840.

The previous prime is 1970780783941. The next prime is 1970780784029. The reversal of 1970780784025 is 5204870870791.

The square root of 1970780784025 is 1403845.

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

It can be written as a sum of positive squares in 4 ways, for example, as 292191059209 + 1678589724816 = 540547^2 + 1295604^2 .

It is not a de Polignac number, because 1970780784025 - 2¹³ = 1970780775833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1970780784029) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6878841 + ... + 7159609.

Almost surely, 2^{1970780784025} is an apocalyptic number.

1970780784025 is the 1403845-th square number.

1970780784025 is the 701923-rd centered octagonal number.

It is an amenable number.

1970780784025 is a deficient number, since it is larger than the sum of its proper divisors (472996092036).

1970780784025 is an frugal number, since it uses more digits than its factorization.

1970780784025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561548 (or 280774 counting only the distinct ones).

The product of its (nonzero) digits is 7902720, while the sum is 58.

The spelling of 1970780784025 in words is "one trillion, nine hundred seventy billion, seven hundred eighty million, seven hundred eighty-four thousand, twenty-five".