52698987990 has 320 divisors, whose sum is σ = 164920250880. Its totient is φ = 11932738560.

The previous prime is 52698987959. The next prime is 52698987997. The reversal of 52698987990 is 9978989625.

It is a happy number.

52698987990 is a `hidden beast` number, since 526 + 9 + 8 + 9 + 8 + 7 + 9 + 90 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52698987997) 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 159 ways as a sum of consecutive naturals, for example, 21053079 + ... + 21055581.

It is an arithmetic number, because the mean of its divisors is an integer number (515375784).

Almost surely, 2^52698987990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52698987990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82460125440).

52698987990 is an abundant number, since it is smaller than the sum of its proper divisors (112221262890).

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

52698987990 is a wasteful number, since it uses less digits than its factorization.

52698987990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2689 (or 2680 counting only the distinct ones).

The product of its (nonzero) digits is 176359680, while the sum is 72.

The spelling of 52698987990 in words is "fifty-two billion, six hundred ninety-eight million, nine hundred eighty-seven thousand, nine hundred ninety".