7821878076512 has 24 divisors (see below), whose sum is σ = 15815520369936. Its totient is φ = 3805237982592.

The previous prime is 7821878076487. The next prime is 7821878076527. The reversal of 7821878076512 is 2156708781287.

It is a super-2 number, since 2×7821878076512² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3303156788 + ... + 3303159155.

It is an arithmetic number, because the mean of its divisors is an integer number (658980015414).

Almost surely, 2^{7821878076512} is an apocalyptic number.

It is an amenable number.

7821878076512 is an abundant number, since it is smaller than the sum of its proper divisors (7993642293424).

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

7821878076512 is a wasteful number, since it uses less digits than its factorization.

7821878076512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6606315990 (or 6606315982 counting only the distinct ones).

The product of its (nonzero) digits is 21073920, while the sum is 62.

The spelling of 7821878076512 in words is "seven trillion, eight hundred twenty-one billion, eight hundred seventy-eight million, seventy-six thousand, five hundred twelve".