21615486046752 has 192 divisors, whose sum is σ = 61379541248256. Its totient is φ = 6621089955840.

The previous prime is 21615486046747. The next prime is 21615486046787. The reversal of 21615486046752 is 25764068451612.

It is a happy number.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 21615486046692 and 21615486046701.

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, 1041549208 + ... + 1041569960.

It is an arithmetic number, because the mean of its divisors is an integer number (319685110668).

Almost surely, 2^{21615486046752} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21615486046752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30689770624128).

21615486046752 is an abundant number, since it is smaller than the sum of its proper divisors (39764055201504).

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

21615486046752 is a wasteful number, since it uses less digits than its factorization.

21615486046752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24483 (or 24475 counting only the distinct ones).

The product of its (nonzero) digits is 19353600, while the sum is 57.

The spelling of 21615486046752 in words is "twenty-one trillion, six hundred fifteen billion, four hundred eighty-six million, forty-six thousand, seven hundred fifty-two".