6984561357 has 6 divisors (see below), whose sum is σ = 10088810862. Its totient is φ = 4656374232.

The previous prime is 6984561281. The next prime is 6984561391. The reversal of 6984561357 is 7531654896.

It can be written as a sum of positive squares in only one way, i.e., 4114709316 + 2869852041 = 64146^2 + 53571^2 .

It is not a de Polignac number, because 6984561357 - 2¹⁶ = 6984495821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6984561757) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 388031178 + ... + 388031195.

It is an arithmetic number, because the mean of its divisors is an integer number (1681468477).

Almost surely, 2^6984561357 is an apocalyptic number.

It is an amenable number.

6984561357 is a deficient number, since it is larger than the sum of its proper divisors (3104249505).

6984561357 is a wasteful number, since it uses less digits than its factorization.

6984561357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776062379 (or 776062376 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 54.

The square root of 6984561357 is about 83573.6881859356. The cubic root of 6984561357 is about 1911.5238113352.

The spelling of 6984561357 in words is "six billion, nine hundred eighty-four million, five hundred sixty-one thousand, three hundred fifty-seven".