1897871617204 has 12 divisors (see below), whose sum is σ = 3411039528484. Its totient is φ = 923288894784.

The previous prime is 1897871617189. The next prime is 1897871617219. The reversal of 1897871617204 is 4027161787981.

It is an interprime number because it is at equal distance from previous prime (1897871617189) and next prime (1897871617219).

It can be written as a sum of positive squares in 2 ways, for example, as 840980702500 + 1056890914704 = 917050^2 + 1028052^2 .

It is a hoax number, since the sum of its digits (61) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6411728289 + ... + 6411728584.

Almost surely, 2^{1897871617204} is an apocalyptic number.

It is an amenable number.

1897871617204 is a deficient number, since it is larger than the sum of its proper divisors (1513167911280).

1897871617204 is a wasteful number, since it uses less digits than its factorization.

1897871617204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12823456914 (or 12823456912 counting only the distinct ones).

The product of its (nonzero) digits is 9483264, while the sum is 61.

The spelling of 1897871617204 in words is "one trillion, eight hundred ninety-seven billion, eight hundred seventy-one million, six hundred seventeen thousand, two hundred four".