54515786490 has 288 divisors, whose sum is σ = 165605141520. Its totient is φ = 12390174720.

The previous prime is 54515786419. The next prime is 54515786491. The reversal of 54515786490 is 9468751545.

It is a happy number.

54515786490 is a `hidden beast` number, since 5 + 4 + 5 + 1 + 578 + 64 + 9 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 27105341769 + 27410444721 = 164637^2 + 165561^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (54515786491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 72015192 + ... + 72015948.

Almost surely, 2^54515786490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 54515786490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82802570760).

54515786490 is an abundant number, since it is smaller than the sum of its proper divisors (111089355030).

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

54515786490 is a wasteful number, since it uses less digits than its factorization.

54515786490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198 (or 1184 counting only the distinct ones).

The product of its (nonzero) digits is 6048000, while the sum is 54.

The spelling of 54515786490 in words is "fifty-four billion, five hundred fifteen million, seven hundred eighty-six thousand, four hundred ninety".