6861556290 has 16 divisors (see below), whose sum is σ = 16467735168. Its totient is φ = 1829748336.

The previous prime is 6861556267. The next prime is 6861556309. The reversal of 6861556290 is 926551686.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114359242 + ... + 114359301.

It is an arithmetic number, because the mean of its divisors is an integer number (1029233448).

Almost surely, 2^6861556290 is an apocalyptic number.

6861556290 is an abundant number, since it is smaller than the sum of its proper divisors (9606178878).

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

6861556290 is a wasteful number, since it uses less digits than its factorization.

6861556290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228718553.

The product of its (nonzero) digits is 777600, while the sum is 48.

The square root of 6861556290 is about 82834.5114671415. The cubic root of 6861556290 is about 1900.2360085408.

The spelling of 6861556290 in words is "six billion, eight hundred sixty-one million, five hundred fifty-six thousand, two hundred ninety".