1974685660133 has 4 divisors (see below), whose sum is σ = 1974711260460. Its totient is φ = 1974660059808.

The previous prime is 1974685660109. The next prime is 1974685660163. The reversal of 1974685660133 is 3310665864791.

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 596451923809 + 1378233736324 = 772303^2 + 1173982^2 .

It is a cyclic number.

It is not a de Polignac number, because 1974685660133 - 2¹⁸ = 1974685397989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1974685660163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12684110 + ... + 12838847.

It is an arithmetic number, because the mean of its divisors is an integer number (493677815115).

Almost surely, 2^{1974685660133} is an apocalyptic number.

It is an amenable number.

1974685660133 is a deficient number, since it is larger than the sum of its proper divisors (25600327).

1974685660133 is an equidigital number, since it uses as much as digits as its factorization.

1974685660133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25600326.

The product of its (nonzero) digits is 19595520, while the sum is 59.

The spelling of 1974685660133 in words is "one trillion, nine hundred seventy-four billion, six hundred eighty-five million, six hundred sixty thousand, one hundred thirty-three".