1836551025 has 27 divisors (see below), whose sum is σ = 3290618721. Its totient is φ = 979151040.

The previous prime is 1836550951. The next prime is 1836551029. The reversal of 1836551025 is 5201556381.

It is a happy number.

The square root of 1836551025 is 42855.

It is a perfect power (a square), and thus also a powerful number.

1836551025 is a `hidden beast` number, since 1 + 83 + 6 + 551 + 0 + 25 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2313441 + 1834237584 = 1521^2 + 42828^2 .

It is not a de Polignac number, because 1836551025 - 2¹⁷ = 1836419953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1836551029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 641397 + ... + 644253.

Almost surely, 2^1836551025 is an apocalyptic number.

1836551025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1836551025 is the 42855-th square number.

1836551025 is the 21428-th centered octagonal number.

It is an amenable number.

1836551025 is a deficient number, since it is larger than the sum of its proper divisors (1454067696).

1836551025 is an frugal number, since it uses more digits than its factorization.

1836551025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5730 (or 2865 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The cubic root of 1836551025 is about 1224.6190179956.

Multiplying 1836551025 by its sum of digits (36), we get a square (66115836900 = 257130²).

The spelling of 1836551025 in words is "one billion, eight hundred thirty-six million, five hundred fifty-one thousand, twenty-five".