1897437375625 has 45 divisors (see below), whose sum is σ = 2606702387443. Its totient is φ = 1379678960000.

The previous prime is 1897437375601. The next prime is 1897437375661. The reversal of 1897437375625 is 5265737347981.

The square root of 1897437375625 is 1377475.

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 1502872490889 + 394564884736 = 1225917^2 + 628144^2 .

It is not a de Polignac number, because 1897437375625 - 2¹³ = 1897437367433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 378803121 + ... + 378808129.

Almost surely, 2^{1897437375625} is an apocalyptic number.

1897437375625 is the 1377475-th square number.

1897437375625 is the 688738-th centered octagonal number.

It is an amenable number.

1897437375625 is a deficient number, since it is larger than the sum of its proper divisors (709265011818).

1897437375625 is an frugal number, since it uses more digits than its factorization.

1897437375625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10060 (or 5025 counting only the distinct ones).

The product of its digits is 266716800, while the sum is 67.

The spelling of 1897437375625 in words is "one trillion, eight hundred ninety-seven billion, four hundred thirty-seven million, three hundred seventy-five thousand, six hundred twenty-five".