1813042975940 has 120 divisors (see below), whose sum is σ = 4702969057752. Its totient is φ = 585048898560.

The previous prime is 1813042975829. The next prime is 1813042975951. The reversal of 1813042975940 is 495792403181.

It can be written as a sum of positive squares in 4 ways, for example, as 1010201887744 + 802841088196 = 1005088^2 + 896014^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 294131 + ... + 1926810.

Almost surely, 2^{1813042975940} is an apocalyptic number.

1813042975940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1813042975940 is an abundant number, since it is smaller than the sum of its proper divisors (2889926081812).

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

1813042975940 is a wasteful number, since it uses less digits than its factorization.

1813042975940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2220995 (or 2220972 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 1813042975940 in words is "one trillion, eight hundred thirteen billion, forty-two million, nine hundred seventy-five thousand, nine hundred forty".