1651289250625 has 75 divisors (see below), whose sum is σ = 2409513280031. Its totient is φ = 1131233208000.

The previous prime is 1651289250623. The next prime is 1651289250631. The reversal of 1651289250625 is 5260529821561.

The square root of 1651289250625 is 1285025.

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

It can be written as a sum of positive squares in 7 ways, for example, as 516927926529 + 1134361324096 = 718977^2 + 1065064^2 .

It is not a de Polignac number, because 1651289250625 - 2¹ = 1651289250623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1651289250623) by changing a digit.

It is a polite number, since it can be written in 74 ways as a sum of consecutive naturals, for example, 1574155101 + ... + 1574156149.

Almost surely, 2^{1651289250625} is an apocalyptic number.

1651289250625 is the 1285025-th square number.

1651289250625 is the 642513-rd centered octagonal number.

It is an amenable number.

1651289250625 is a deficient number, since it is larger than the sum of its proper divisors (758224029406).

1651289250625 is an frugal number, since it uses more digits than its factorization.

1651289250625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2146 (or 1061 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 52.

The spelling of 1651289250625 in words is "one trillion, six hundred fifty-one billion, two hundred eighty-nine million, two hundred fifty thousand, six hundred twenty-five".