1809866848370 has 48 divisors (see below), whose sum is σ = 3789841426560. Its totient is φ = 620492723424.

The previous prime is 1809866848303. The next prime is 1809866848381. The reversal of 1809866848370 is 738486689081.

It is a self number, because there is not a number n which added to its sum of digits gives 1809866848370.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10211447 + ... + 10387173.

It is an arithmetic number, because the mean of its divisors is an integer number (78955029720).

Almost surely, 2^{1809866848370} is an apocalyptic number.

1809866848370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1809866848370 is an abundant number, since it is smaller than the sum of its proper divisors (1979974578190).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1809866848370 is a wasteful number, since it uses less digits than its factorization.

1809866848370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196767 (or 196760 counting only the distinct ones).

The product of its (nonzero) digits is 111476736, while the sum is 68.

The spelling of 1809866848370 in words is "one trillion, eight hundred nine billion, eight hundred sixty-six million, eight hundred forty-eight thousand, three hundred seventy".