6781970949 has 16 divisors (see below), whose sum is σ = 9883564992. Its totient is φ = 4111227648.

The previous prime is 6781970947. The next prime is 6781970957. The reversal of 6781970949 is 9490791876.

It is not a de Polignac number, because 6781970949 - 2¹ = 6781970947 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6781970892 and 6781970901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6781970947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1295124 + ... + 1300349.

It is an arithmetic number, because the mean of its divisors is an integer number (617722812).

Almost surely, 2^6781970949 is an apocalyptic number.

It is an amenable number.

6781970949 is a deficient number, since it is larger than the sum of its proper divisors (3101594043).

6781970949 is a wasteful number, since it uses less digits than its factorization.

6781970949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2595556.

The product of its (nonzero) digits is 6858432, while the sum is 60.

The square root of 6781970949 is about 82352.7227783028. The cubic root of 6781970949 is about 1892.8606446580.

The spelling of 6781970949 in words is "six billion, seven hundred eighty-one million, nine hundred seventy thousand, nine hundred forty-nine".