6894978880 has 56 divisors (see below), whose sum is σ = 16429637448. Its totient is φ = 2756149248.

The previous prime is 6894978877. The next prime is 6894978887. The reversal of 6894978880 is 888794986.

It can be written as a sum of positive squares in 4 ways, for example, as 1352474176 + 5542504704 = 36776^2 + 74448^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6894978887) 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, 536692 + ... + 549388.

It is an arithmetic number, because the mean of its divisors is an integer number (293386383).

Almost surely, 2^6894978880 is an apocalyptic number.

It is an amenable number.

6894978880 is an abundant number, since it is smaller than the sum of its proper divisors (9534658568).

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

6894978880 is a wasteful number, since it uses less digits than its factorization.

6894978880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14411 (or 14401 counting only the distinct ones).

The product of its (nonzero) digits is 55738368, while the sum is 67.

The square root of 6894978880 is about 83036.0095380311. The cubic root of 6894978880 is about 1903.3163576754.

The spelling of 6894978880 in words is "six billion, eight hundred ninety-four million, nine hundred seventy-eight thousand, eight hundred eighty".