1812925645297 has 4 divisors (see below), whose sum is σ = 1952381464180. Its totient is φ = 1673469826416.

The previous prime is 1812925645277. The next prime is 1812925645309. The reversal of 1812925645297 is 7925465292181.

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 1096458200161 + 716467445136 = 1047119^2 + 846444^2 .

It is a cyclic number.

It is not a de Polignac number, because 1812925645297 - 2³⁹ = 1263169831409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1812925645217) 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, 69727909422 + ... + 69727909447.

It is an arithmetic number, because the mean of its divisors is an integer number (488095366045).

Almost surely, 2^{1812925645297} is an apocalyptic number.

It is an amenable number.

1812925645297 is a deficient number, since it is larger than the sum of its proper divisors (139455818883).

1812925645297 is a wasteful number, since it uses less digits than its factorization.

1812925645297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139455818882.

The product of its digits is 21772800, while the sum is 61.

The spelling of 1812925645297 in words is "one trillion, eight hundred twelve billion, nine hundred twenty-five million, six hundred forty-five thousand, two hundred ninety-seven".