1071078989815 has 4 divisors (see below), whose sum is σ = 1285294787784. Its totient is φ = 856863191848.

The previous prime is 1071078989749. The next prime is 1071078989857. The reversal of 1071078989815 is 5189898701701.

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 1071078989815 - 2²⁹ = 1070542118903 is a prime.

It is a super-2 number, since 2×1071078989815² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 107107898977 + ... + 107107898986.

It is an arithmetic number, because the mean of its divisors is an integer number (321323696946).

Almost surely, 2^{1071078989815} is an apocalyptic number.

1071078989815 is a deficient number, since it is larger than the sum of its proper divisors (214215797969).

1071078989815 is an equidigital number, since it uses as much as digits as its factorization.

1071078989815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214215797968.

The product of its (nonzero) digits is 10160640, while the sum is 64.

The spelling of 1071078989815 in words is "one trillion, seventy-one billion, seventy-eight million, nine hundred eighty-nine thousand, eight hundred fifteen".