6861551078 has 8 divisors (see below), whose sum is σ = 10292679072. Its totient is φ = 3430658056.

The previous prime is 6861551077. The next prime is 6861551087. The reversal of 6861551078 is 8701551686.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6861551077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76976 + ... + 140172.

It is an arithmetic number, because the mean of its divisors is an integer number (1286584884).

Almost surely, 2^6861551078 is an apocalyptic number.

6861551078 is a deficient number, since it is larger than the sum of its proper divisors (3431127994).

6861551078 is a wasteful number, since it uses less digits than its factorization.

6861551078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117486.

The product of its (nonzero) digits is 403200, while the sum is 47.

The square root of 6861551078 is about 82834.4800068184. The cubic root of 6861551078 is about 1900.2355274044.

The spelling of 6861551078 in words is "six billion, eight hundred sixty-one million, five hundred fifty-one thousand, seventy-eight".