6781691952 has 200 divisors, whose sum is σ = 23752292256. Its totient is φ = 1823606784.

The previous prime is 6781691951. The next prime is 6781691953. The reversal of 6781691952 is 2591961876.

It is an interprime number because it is at equal distance from previous prime (6781691951) and next prime (6781691953).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (6781691951) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 132238 + ... + 176210.

Almost surely, 2^6781691952 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6781691952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11876146128).

6781691952 is an abundant number, since it is smaller than the sum of its proper divisors (16970600304).

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

6781691952 is a wasteful number, since it uses less digits than its factorization.

6781691952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44017 (or 44002 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The square root of 6781691952 is about 82351.0288460320. The cubic root of 6781691952 is about 1892.8346881090.

The spelling of 6781691952 in words is "six billion, seven hundred eighty-one million, six hundred ninety-one thousand, nine hundred fifty-two".