1897128275266 has 16 divisors (see below), whose sum is σ = 3443526953856. Its totient is φ = 765228211776.

The previous prime is 1897128275243. The next prime is 1897128275333. The reversal of 1897128275266 is 6625728217981.

It is a junction number, because it is equal to n+sod(n) for n = 1897128275198 and 1897128275207.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3985563366 + ... + 3985563841.

It is an arithmetic number, because the mean of its divisors is an integer number (215220434616).

Almost surely, 2^{1897128275266} is an apocalyptic number.

1897128275266 is a deficient number, since it is larger than the sum of its proper divisors (1546398678590).

1897128275266 is a wasteful number, since it uses less digits than its factorization.

1897128275266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7971127233.

The product of its digits is 40642560, while the sum is 64.

The spelling of 1897128275266 in words is "one trillion, eight hundred ninety-seven billion, one hundred twenty-eight million, two hundred seventy-five thousand, two hundred sixty-six".