6929781118464 has 80 divisors (see below), whose sum is σ = 18465225440112. Its totient is φ = 2309444640768.

The previous prime is 6929781118457. The next prime is 6929781118471. The reversal of 6929781118464 is 4648111879296.

It is an interprime number because it is at equal distance from previous prime (6929781118457) and next prime (6929781118471).

It is a junction number, because it is equal to n+sod(n) for n = 6929781118395 and 6929781118404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6924082 + ... + 7861454.

Almost surely, 2^{6929781118464} is an apocalyptic number.

6929781118464 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

6929781118464 is an abundant number, since it is smaller than the sum of its proper divisors (11535444321648).

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

6929781118464 is an equidigital number, since it uses as much as digits as its factorization.

6929781118464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942207 (or 942191 counting only the distinct ones).

The product of its digits is 41803776, while the sum is 66.

The spelling of 6929781118464 in words is "six trillion, nine hundred twenty-nine billion, seven hundred eighty-one million, one hundred eighteen thousand, four hundred sixty-four".