1020126875819 has 16 divisors (see below), whose sum is σ = 1098852585600. Its totient is φ = 943907198976.

The previous prime is 1020126875783. The next prime is 1020126875861. The reversal of 1020126875819 is 9185786210201.

It is a cyclic number.

It is not a de Polignac number, because 1020126875819 - 2¹² = 1020126871723 is a prime.

It is a super-2 number, since 2×1020126875819² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020126875419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27088427 + ... + 27126059.

It is an arithmetic number, because the mean of its divisors is an integer number (68678286600).

Almost surely, 2^{1020126875819} is an apocalyptic number.

1020126875819 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1020126875819 is a deficient number, since it is larger than the sum of its proper divisors (78725709781).

1020126875819 is a wasteful number, since it uses less digits than its factorization.

1020126875819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70874.

The product of its (nonzero) digits is 483840, while the sum is 50.

The spelling of 1020126875819 in words is "one trillion, twenty billion, one hundred twenty-six million, eight hundred seventy-five thousand, eight hundred nineteen".