1811749110125 has 12 divisors (see below), whose sum is σ = 2261081670588. Its totient is φ = 1449387249000.

The previous prime is 1811749110091. The next prime is 1811749110131. The reversal of 1811749110125 is 5210119471181.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 57975971524 + 1753773138601 = 240782^2 + 1324301^2 .

It is not a de Polignac number, because 1811749110125 - 2¹² = 1811749106029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14988680 + ... + 15109070.

It is an arithmetic number, because the mean of its divisors is an integer number (188423472549).

Almost surely, 2^{1811749110125} is an apocalyptic number.

It is an amenable number.

1811749110125 is a deficient number, since it is larger than the sum of its proper divisors (449332560463).

1811749110125 is an frugal number, since it uses more digits than its factorization.

1811749110125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240797 (or 120396 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 41.

The spelling of 1811749110125 in words is "one trillion, eight hundred eleven billion, seven hundred forty-nine million, one hundred ten thousand, one hundred twenty-five".