7811200205040 has 80 divisors (see below), whose sum is σ = 24215077028736. Its totient is φ = 2082956064000.

The previous prime is 7811200204993. The next prime is 7811200205041. The reversal of 7811200205040 is 405020021187.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×7811200205040² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 7811200204989 and 7811200205007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7811200205041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19474515 + ... + 19871565.

Almost surely, 2^{7811200205040} is an apocalyptic number.

It is an amenable number.

7811200205040 is an abundant number, since it is smaller than the sum of its proper divisors (16403876823696).

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

7811200205040 is a wasteful number, since it uses less digits than its factorization.

7811200205040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479038 (or 479032 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 30.

The spelling of 7811200205040 in words is "seven trillion, eight hundred eleven billion, two hundred million, two hundred five thousand, forty".