6813407554 has 8 divisors (see below), whose sum is σ = 10222596540. Its totient is φ = 3405875376.

The previous prime is 6813407551. The next prime is 6813407567. The reversal of 6813407554 is 4557043186.

It can be written as a sum of positive squares in 2 ways, for example, as 6548531929 + 264875625 = 80923^2 + 16275^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 6813407554.

It is not an unprimeable number, because it can be changed into a prime (6813407551) 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, 403869 + ... + 420400.

Almost surely, 2^6813407554 is an apocalyptic number.

6813407554 is a deficient number, since it is larger than the sum of its proper divisors (3409188986).

6813407554 is a wasteful number, since it uses less digits than its factorization.

6813407554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828404.

The product of its (nonzero) digits is 403200, while the sum is 43.

The square root of 6813407554 is about 82543.3677166131. The cubic root of 6813407554 is about 1895.7808088770.

The spelling of 6813407554 in words is "six billion, eight hundred thirteen million, four hundred seven thousand, five hundred fifty-four".