1550153521220 has 12 divisors (see below), whose sum is σ = 3255322394604. Its totient is φ = 620061408480.

The previous prime is 1550153521201. The next prime is 1550153521247. The reversal of 1550153521220 is 221253510551.

It can be written as a sum of positive squares in 2 ways, for example, as 722173636864 + 827979884356 = 849808^2 + 909934^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38753838011 + ... + 38753838050.

It is an arithmetic number, because the mean of its divisors is an integer number (271276866217).

Almost surely, 2^{1550153521220} is an apocalyptic number.

1550153521220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1550153521220 is an abundant number, since it is smaller than the sum of its proper divisors (1705168873384).

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

1550153521220 is a wasteful number, since it uses less digits than its factorization.

1550153521220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77507676070 (or 77507676068 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 32.

The spelling of 1550153521220 in words is "one trillion, five hundred fifty billion, one hundred fifty-three million, five hundred twenty-one thousand, two hundred twenty".