6988857261 has 8 divisors (see below), whose sum is σ = 9405565344. Its totient is φ = 4615693680.

The previous prime is 6988857203. The next prime is 6988857269. The reversal of 6988857261 is 1627588896.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6988857261 - 2⁷ = 6988857133 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6988857195 and 6988857204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6988857269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10885750 + ... + 10886391.

It is an arithmetic number, because the mean of its divisors is an integer number (1175695668).

Almost surely, 2^6988857261 is an apocalyptic number.

It is an amenable number.

6988857261 is a deficient number, since it is larger than the sum of its proper divisors (2416708083).

6988857261 is a wasteful number, since it uses less digits than its factorization.

6988857261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21772251.

The product of its digits is 11612160, while the sum is 60.

The square root of 6988857261 is about 83599.3855300384. The cubic root of 6988857261 is about 1911.9156297751.

The spelling of 6988857261 in words is "six billion, nine hundred eighty-eight million, eight hundred fifty-seven thousand, two hundred sixty-one".