1621505150080 has 128 divisors (see below), whose sum is σ = 4081763376000. Its totient is φ = 614264684544.

The previous prime is 1621505150063. The next prime is 1621505150081. The reversal of 1621505150080 is 800515051261.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (1621505150081) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 40338952 + ... + 40379128.

It is an arithmetic number, because the mean of its divisors is an integer number (31888776375).

Almost surely, 2^{1621505150080} is an apocalyptic number.

1621505150080 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 1621505150080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2040881688000).

1621505150080 is an abundant number, since it is smaller than the sum of its proper divisors (2460258225920).

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

1621505150080 is a wasteful number, since it uses less digits than its factorization.

1621505150080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43534 (or 43522 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 34.

The spelling of 1621505150080 in words is "one trillion, six hundred twenty-one billion, five hundred five million, one hundred fifty thousand, eighty".