5661912498 has 64 divisors (see below), whose sum is σ = 12796185600. Its totient is φ = 1654372160.

The previous prime is 5661912493. The next prime is 5661912499. The reversal of 5661912498 is 8942191665.

It is a self number, because there is not a number n which added to its sum of digits gives 5661912498.

It is not an unprimeable number, because it can be changed into a prime (5661912493) 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 31 ways as a sum of consecutive naturals, for example, 1948915 + ... + 1951817.

It is an arithmetic number, because the mean of its divisors is an integer number (199940400).

Almost surely, 2^5661912498 is an apocalyptic number.

5661912498 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 5661912498, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6398092800).

5661912498 is an abundant number, since it is smaller than the sum of its proper divisors (7134273102).

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

5661912498 is a wasteful number, since it uses less digits than its factorization.

5661912498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3967.

The product of its digits is 933120, while the sum is 51.

The square root of 5661912498 is about 75245.6809258844. The cubic root of 5661912498 is about 1782.3283608788.

The spelling of 5661912498 in words is "five billion, six hundred sixty-one million, nine hundred twelve thousand, four hundred ninety-eight".