2621371474225 has 81 divisors (see below), whose sum is σ = 3817754400033. Its totient is φ = 1780297968960.

The previous prime is 2621371474223. The next prime is 2621371474231. The reversal of 2621371474225 is 5224741731262.

The square root of 2621371474225 is 1619065.

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

It can be written as a sum of positive squares in 4 ways, for example, as 600697852209 + 2020673622016 = 775047^2 + 1421504^2 .

It is not a de Polignac number, because 2621371474225 - 2¹ = 2621371474223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2621371474223) 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 80 ways as a sum of consecutive naturals, for example, 9463434787 + ... + 9463435063.

Almost surely, 2^{2621371474225} is an apocalyptic number.

2621371474225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2621371474225 is the 1619065-th square number.

2621371474225 is the 809533-rd centered octagonal number.

It is an amenable number.

2621371474225 is a deficient number, since it is larger than the sum of its proper divisors (1196382925808).

2621371474225 is an frugal number, since it uses more digits than its factorization.

2621371474225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912 (or 456 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 46.

The spelling of 2621371474225 in words is "two trillion, six hundred twenty-one billion, three hundred seventy-one million, four hundred seventy-four thousand, two hundred twenty-five".