1873978976881 has 12 divisors (see below), whose sum is σ = 2065730264500. Its totient is φ = 1698735788640.

The previous prime is 1873978976867. The next prime is 1873978976921. The reversal of 1873978976881 is 1886798793781.

It can be written as a sum of positive squares in 2 ways, for example, as 1483865059600 + 390113917281 = 1218140^2 + 624591^2 .

It is not a de Polignac number, because 1873978976881 - 2³³ = 1865389042289 is a prime.

It is a super-2 number, since 2×1873978976881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1873978976795 and 1873978976804.

It is not an unprimeable number, because it can be changed into a prime (1873978971881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22146066 + ... + 22230523.

Almost surely, 2^{1873978976881} is an apocalyptic number.

1873978976881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1873978976881 is a deficient number, since it is larger than the sum of its proper divisors (191751287619).

1873978976881 is a wasteful number, since it uses less digits than its factorization.

1873978976881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44376960 (or 44376949 counting only the distinct ones).

The product of its digits is 2048385024, while the sum is 82.

The spelling of 1873978976881 in words is "one trillion, eight hundred seventy-three billion, nine hundred seventy-eight million, nine hundred seventy-six thousand, eight hundred eighty-one".