15204240542550 has 192 divisors, whose sum is σ = 40266519920640. Its totient is φ = 3785736528000.

The previous prime is 15204240542549. The next prime is 15204240542599. The reversal of 15204240542550 is 5524504240251.

15204240542550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×15204240542550² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15204240542499 and 15204240542508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 61816315 + ... + 62061785.

It is an arithmetic number, because the mean of its divisors is an integer number (209721457920).

Almost surely, 2^{15204240542550} is an apocalyptic number.

15204240542550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15204240542550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20133259960320).

15204240542550 is an abundant number, since it is smaller than the sum of its proper divisors (25062279378090).

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

15204240542550 is a wasteful number, since it uses less digits than its factorization.

15204240542550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245819 (or 245814 counting only the distinct ones).

The product of its (nonzero) digits is 320000, while the sum is 39.

The spelling of 15204240542550 in words is "fifteen trillion, two hundred four billion, two hundred forty million, five hundred forty-two thousand, five hundred fifty".