6931219680 has 768 divisors, whose sum is σ = 30795448320. Its totient is φ = 1414195200.

The previous prime is 6931219679. The next prime is 6931219709. The reversal of 6931219680 is 869121396.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 22286725 + ... + 22287035.

It is an arithmetic number, because the mean of its divisors is an integer number (40098240).

Almost surely, 2^6931219680 is an apocalyptic number.

6931219680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6931219680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15397724160).

6931219680 is an abundant number, since it is smaller than the sum of its proper divisors (23864228640).

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

6931219680 is a wasteful number, since it uses less digits than its factorization.

6931219680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420 (or 406 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 6931219680 is about 83253.9469334638. The cubic root of 6931219680 is about 1906.6452152269.

The spelling of 6931219680 in words is "six billion, nine hundred thirty-one million, two hundred nineteen thousand, six hundred eighty".