6409658878 has 32 divisors (see below), whose sum is σ = 11109892608. Its totient is φ = 2716610400.

The previous prime is 6409658867. The next prime is 6409658881. The reversal of 6409658878 is 8788569046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 941848 + ... + 948628.

It is an arithmetic number, because the mean of its divisors is an integer number (347184144).

Almost surely, 2^6409658878 is an apocalyptic number.

6409658878 is a deficient number, since it is larger than the sum of its proper divisors (4700233730).

6409658878 is a wasteful number, since it uses less digits than its factorization.

6409658878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7528.

The product of its (nonzero) digits is 23224320, while the sum is 61.

The square root of 6409658878 is about 80060.3452278342. The cubic root of 6409658878 is about 1857.5690752245.

The spelling of 6409658878 in words is "six billion, four hundred nine million, six hundred fifty-eight thousand, eight hundred seventy-eight".