1787448672025 has 9 divisors (see below), whose sum is σ = 2216444642463. Its totient is φ = 1429953589800.

The previous prime is 1787448672017. The next prime is 1787448672041. The reversal of 1787448672025 is 5202768447871.

The square root of 1787448672025 is 1336955.

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

It can be written as a sum of positive squares in only one way, i.e., 643481521929 + 1143967150096 = 802173^2 + 1069564^2 .

It is not a de Polignac number, because 1787448672025 - 2³ = 1787448672017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6551080 + ... + 6818470.

Almost surely, 2^{1787448672025} is an apocalyptic number.

1787448672025 is the 1336955-th square number.

1787448672025 is the 668478-th centered octagonal number.

It is an amenable number.

1787448672025 is a deficient number, since it is larger than the sum of its proper divisors (428995970438).

1787448672025 is an frugal number, since it uses more digits than its factorization.

1787448672025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534792 (or 267396 counting only the distinct ones).

The product of its (nonzero) digits is 42147840, while the sum is 61.

The spelling of 1787448672025 in words is "one trillion, seven hundred eighty-seven billion, four hundred forty-eight million, six hundred seventy-two thousand, twenty-five".