6897557986 has 32 divisors (see below), whose sum is σ = 11375007552. Its totient is φ = 3110880960.

The previous prime is 6897557977. The next prime is 6897557987.

6897557986 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (6897557987) 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, 1580920 + ... + 1585276.

It is an arithmetic number, because the mean of its divisors is an integer number (355468986).

Almost surely, 2^6897557986 is an apocalyptic number.

6897557986 is a deficient number, since it is larger than the sum of its proper divisors (4477449566).

6897557986 is a wasteful number, since it uses less digits than its factorization.

6897557986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4914.

The product of its digits is 228614400, while the sum is 70.

The square root of 6897557986 is about 83051.5381314518. The cubic root of 6897557986 is about 1903.5536435221.

The spelling of 6897557986 in words is "six billion, eight hundred ninety-seven million, five hundred fifty-seven thousand, nine hundred eighty-six".