15500738489040 has 1280 divisors, whose sum is σ = 64096468992000. Its totient is φ = 3410467006464.

The previous prime is 15500738489017. The next prime is 15500738489083. The reversal of 15500738489040 is 4098483700551.

15500738489040 is a `hidden beast` number, since 1 + 5 + 50 + 0 + 73 + 8 + 489 + 0 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 21558745801 + ... + 21558746519.

It is an arithmetic number, because the mean of its divisors is an integer number (50075366400).

Almost surely, 2^{15500738489040} is an apocalyptic number.

15500738489040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15500738489040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32048234496000).

15500738489040 is an abundant number, since it is smaller than the sum of its proper divisors (48595730502960).

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

15500738489040 is an equidigital number, since it uses as much as digits as its factorization.

15500738489040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396 (or 1372 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 54.

The spelling of 15500738489040 in words is "fifteen trillion, five hundred billion, seven hundred thirty-eight million, four hundred eighty-nine thousand, forty".