2068816554 has 72 divisors (see below), whose sum is σ = 5222440548. Its totient is φ = 590163840.

The previous prime is 2068816549. The next prime is 2068816567. The reversal of 2068816554 is 4556188602.

2068816554 is a `hidden beast` number, since 2 + 0 + 6 + 88 + 16 + 554 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2067066225 + 1750329 = 45465^2 + 1323^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 722694 + ... + 725550.

Almost surely, 2^2068816554 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2068816554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2611220274).

2068816554 is an abundant number, since it is smaller than the sum of its proper divisors (3153623994).

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

2068816554 is a wasteful number, since it uses less digits than its factorization.

2068816554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3700 (or 3690 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The square root of 2068816554 is about 45484.2451185023. The cubic root of 2068816554 is about 1274.2089783179.

The spelling of 2068816554 in words is "two billion, sixty-eight million, eight hundred sixteen thousand, five hundred fifty-four".