1655212988320 has 24 divisors (see below), whose sum is σ = 3910440685284. Its totient is φ = 662085195264.

The previous prime is 1655212988279. The next prime is 1655212988321. The reversal of 1655212988320 is 238892125561.

It can be written as a sum of positive squares in 2 ways, for example, as 1532059719696 + 123153268624 = 1237764^2 + 350932^2 .

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1655212988321) 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 3 ways as a sum of consecutive naturals, for example, 5172540429 + ... + 5172540748.

Almost surely, 2^{1655212988320} is an apocalyptic number.

1655212988320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1655212988320 is an abundant number, since it is smaller than the sum of its proper divisors (2255227696964).

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

1655212988320 is a wasteful number, since it uses less digits than its factorization.

1655212988320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10345081192 (or 10345081184 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 52.

The spelling of 1655212988320 in words is "one trillion, six hundred fifty-five billion, two hundred twelve million, nine hundred eighty-eight thousand, three hundred twenty".