1017821883870 has 80 divisors (see below), whose sum is σ = 2985610885488. Its totient is φ = 246744696960.

The previous prime is 1017821883853. The next prime is 1017821883971. The reversal of 1017821883870 is 783881287101.

1017821883870 is a `hidden beast` number, since 1 + 0 + 1 + 7 + 82 + 188 + 387 + 0 = 666.

It is a super-2 number, since 2×1017821883870² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 57107919 + ... + 57125738.

Almost surely, 2^{1017821883870} is an apocalyptic number.

1017821883870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1017821883870 is an abundant number, since it is smaller than the sum of its proper divisors (1967789001618).

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

1017821883870 is a wasteful number, since it uses less digits than its factorization.

1017821883870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114233687 (or 114233678 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 54.

The spelling of 1017821883870 in words is "one trillion, seventeen billion, eight hundred twenty-one million, eight hundred eighty-three thousand, eight hundred seventy".