1017775841920 has 32 divisors (see below), whose sum is σ = 2433120373620. Its totient is φ = 407110336512.

The previous prime is 1017775841917. The next prime is 1017775841947. The reversal of 1017775841920 is 291485777101.

It can be written as a sum of positive squares in 2 ways, for example, as 956656135744 + 61119706176 = 978088^2 + 247224^2 .

It is a tau number, because it is divible by the number of its divisors (32).

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, 795136737 + ... + 795138016.

Almost surely, 2^{1017775841920} is an apocalyptic number.

1017775841920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1017775841920 is an abundant number, since it is smaller than the sum of its proper divisors (1415344531700).

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

1017775841920 is an equidigital number, since it uses as much as digits as its factorization.

1017775841920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590274772 (or 1590274760 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 52.

The spelling of 1017775841920 in words is "one trillion, seventeen billion, seven hundred seventy-five million, eight hundred forty-one thousand, nine hundred twenty".