1012887856919 has 4 divisors (see below), whose sum is σ = 1012892802120. Its totient is φ = 1012882911720.

The previous prime is 1012887856909. The next prime is 1012887856921. The reversal of 1012887856919 is 9196587882101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1012887856919 - 2²⁰ = 1012886808343 is a prime.

It is a super-2 number, since 2×1012887856919² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012887856909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2151464 + ... + 2579645.

It is an arithmetic number, because the mean of its divisors is an integer number (253223200530).

Almost surely, 2^{1012887856919} is an apocalyptic number.

1012887856919 is a deficient number, since it is larger than the sum of its proper divisors (4945201).

1012887856919 is an equidigital number, since it uses as much as digits as its factorization.

1012887856919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4945200.

The product of its (nonzero) digits is 17418240, while the sum is 65.

The spelling of 1012887856919 in words is "one trillion, twelve billion, eight hundred eighty-seven million, eight hundred fifty-six thousand, nine hundred nineteen".