1970597553865 has 4 divisors (see below), whose sum is σ = 2364717064644. Its totient is φ = 1576478043088.

The previous prime is 1970597553809. The next prime is 1970597553877. The reversal of 1970597553865 is 5683557950791.

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 1271148012304 + 699449541561 = 1127452^2 + 836331^2 .

It is a cyclic number.

It is not a de Polignac number, because 1970597553865 - 2¹¹ = 1970597551817 is a prime.

It is a super-3 number, since 3×1970597553865³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1970597553794 and 1970597553803.

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 3 ways as a sum of consecutive naturals, for example, 197059755382 + ... + 197059755391.

It is an arithmetic number, because the mean of its divisors is an integer number (591179266161).

Almost surely, 2^{1970597553865} is an apocalyptic number.

It is an amenable number.

1970597553865 is a deficient number, since it is larger than the sum of its proper divisors (394119510779).

1970597553865 is an equidigital number, since it uses as much as digits as its factorization.

1970597553865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394119510778.

The product of its (nonzero) digits is 357210000, while the sum is 70.

The spelling of 1970597553865 in words is "one trillion, nine hundred seventy billion, five hundred ninety-seven million, five hundred fifty-three thousand, eight hundred sixty-five".