1780489922500 has 45 divisors (see below), whose sum is σ = 3893721265819. Its totient is φ = 712169282000.

The previous prime is 1780489922473. The next prime is 1780489922501. The reversal of 1780489922500 is 52299840871.

The square root of 1780489922500 is 1334350.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 139590409924 + 1640899512576 = 373618^2 + 1280976^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1780489922501) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 66704157 + ... + 66730843.

Almost surely, 2^{1780489922500} is an apocalyptic number.

1780489922500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1780489922500 is the 1334350-th square number.

It is an amenable number.

1780489922500 is an abundant number, since it is smaller than the sum of its proper divisors (2113231343319).

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

1780489922500 is an frugal number, since it uses more digits than its factorization.

1780489922500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53398 (or 26694 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 55.

The spelling of 1780489922500 in words is "one trillion, seven hundred eighty billion, four hundred eighty-nine million, nine hundred twenty-two thousand, five hundred".