2061449850625 has 135 divisors (see below), whose sum is σ = 2973013638133. Its totient is φ = 1427734660000.

The previous prime is 2061449850617. The next prime is 2061449850641. The reversal of 2061449850625 is 5260589441602.

The square root of 2061449850625 is 1435775.

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

It can be written as a sum of positive squares in 2 ways, for example, as 161617668289 + 1899832182336 = 402017^2 + 1378344^2 .

It is not a de Polignac number, because 2061449850625 - 2³ = 2061449850617 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 9081276762 + ... + 9081276988.

Almost surely, 2^{2061449850625} is an apocalyptic number.

2061449850625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2061449850625 is the 1435775-th square number.

2061449850625 is the 717888-th centered octagonal number.

It is an amenable number.

2061449850625 is a deficient number, since it is larger than the sum of its proper divisors (911563787508).

2061449850625 is an frugal number, since it uses more digits than its factorization.

2061449850625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 52.

The spelling of 2061449850625 in words is "two trillion, sixty-one billion, four hundred forty-nine million, eight hundred fifty thousand, six hundred twenty-five".