6919898154 has 64 divisors (see below), whose sum is σ = 15923228160. Its totient is φ = 1987001280.

The previous prime is 6919898119. The next prime is 6919898203. The reversal of 6919898154 is 4518989196.

6919898154 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64449 + ... + 134139.

It is an arithmetic number, because the mean of its divisors is an integer number (248800440).

Almost surely, 2^6919898154 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6919898154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7961614080).

6919898154 is an abundant number, since it is smaller than the sum of its proper divisors (9003330006).

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

6919898154 is a wasteful number, since it uses less digits than its factorization.

6919898154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69795.

The product of its digits is 5598720, while the sum is 60.

The square root of 6919898154 is about 83185.9252157479. The cubic root of 6919898154 is about 1905.6065381467.

The spelling of 6919898154 in words is "six billion, nine hundred nineteen million, eight hundred ninety-eight thousand, one hundred fifty-four".