1810490401 has 4 divisors (see below), whose sum is σ = 1859422612. Its totient is φ = 1761558192.

The previous prime is 1810490399. The next prime is 1810490419. The reversal of 1810490401 is 1040940181.

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 742508001 + 1067982400 = 27249^2 + 32680^2 .

It is a cyclic number.

It is not a de Polignac number, because 1810490401 - 2¹ = 1810490399 is a prime.

It is a super-2 number, since 2×1810490401² = 6555750984226281602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1810490401.

It is not an unprimeable number, because it can be changed into a prime (1810493401) 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, 24466050 + ... + 24466123.

It is an arithmetic number, because the mean of its divisors is an integer number (464855653).

Almost surely, 2^1810490401 is an apocalyptic number.

It is an amenable number.

1810490401 is a deficient number, since it is larger than the sum of its proper divisors (48932211).

1810490401 is an equidigital number, since it uses as much as digits as its factorization.

1810490401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48932210.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 1810490401 is about 42549.8578258494. The cubic root of 1810490401 is about 1218.7989615710.

The spelling of 1810490401 in words is "one billion, eight hundred ten million, four hundred ninety thousand, four hundred one".