7800000100111 has 4 divisors (see below), whose sum is σ = 7804077467472. Its totient is φ = 7795922732752.

The previous prime is 7800000100027. The next prime is 7800000100141. The reversal of 7800000100111 is 1110010000087.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7800000100111 is a prime.

It is a super-2 number, since 2×7800000100111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7800000100141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2038680811 + ... + 2038684636.

It is an arithmetic number, because the mean of its divisors is an integer number (1951019366868).

Almost surely, 2^{7800000100111} is an apocalyptic number.

7800000100111 is a deficient number, since it is larger than the sum of its proper divisors (4077367361).

7800000100111 is a wasteful number, since it uses less digits than its factorization.

7800000100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4077367360.

The product of its (nonzero) digits is 56, while the sum is 19.

Adding to 7800000100111 its reverse (1110010000087), we get a palindrome (8910010100198).

The spelling of 7800000100111 in words is "seven trillion, eight hundred billion, one hundred thousand, one hundred eleven".