1818290375904 has 48 divisors (see below), whose sum is σ = 4792817327760. Its totient is φ = 603581859840.

The previous prime is 1818290375903. The next prime is 1818290375981. The reversal of 1818290375904 is 4095730928181.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×1818290375904² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818290375903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39272559 + ... + 39318830.

It is an arithmetic number, because the mean of its divisors is an integer number (99850360995).

Almost surely, 2^{1818290375904} is an apocalyptic number.

It is an amenable number.

1818290375904 is an abundant number, since it is smaller than the sum of its proper divisors (2974526951856).

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

1818290375904 is a wasteful number, since it uses less digits than its factorization.

1818290375904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78591643 (or 78591635 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 57.

The spelling of 1818290375904 in words is "one trillion, eight hundred eighteen billion, two hundred ninety million, three hundred seventy-five thousand, nine hundred four".