1920040575685 has 4 divisors (see below), whose sum is σ = 2304048690828. Its totient is φ = 1536032460544.

The previous prime is 1920040575631. The next prime is 1920040575689. The reversal of 1920040575685 is 5865750400291.

It is a happy number.

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 441036779236 + 1479003796449 = 664106^2 + 1216143^2 .

It is a cyclic number.

It is not a de Polignac number, because 1920040575685 - 2¹¹ = 1920040573637 is a prime.

It is a super-3 number, since 3×1920040575685³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920040575689) 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, 192004057564 + ... + 192004057573.

It is an arithmetic number, because the mean of its divisors is an integer number (576012172707).

Almost surely, 2^{1920040575685} is an apocalyptic number.

It is an amenable number.

1920040575685 is a deficient number, since it is larger than the sum of its proper divisors (384008115143).

1920040575685 is an equidigital number, since it uses as much as digits as its factorization.

1920040575685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384008115142.

The product of its (nonzero) digits is 3024000, while the sum is 52.

The spelling of 1920040575685 in words is "one trillion, nine hundred twenty billion, forty million, five hundred seventy-five thousand, six hundred eighty-five".