1078878993481 has 3 divisors (see below), whose sum is σ = 1078880032173. Its totient is φ = 1078877954790.

The previous prime is 1078878993449. The next prime is 1078878993503. The reversal of 1078878993481 is 1843998788701.

The square root of 1078878993481 is 1038691.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1078878993481 - 2⁵ = 1078878993449 is a prime.

It is a super-2 number, since 2×1078878993481² (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 (1078878993581) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 519346 + ... + 1558036.

It is an arithmetic number, because the mean of its divisors is an integer number (359626677391).

Almost surely, 2^{1078878993481} is an apocalyptic number.

1078878993481 is the 1038691-st square number.

1078878993481 is the 519346-th centered octagonal number.

It is an amenable number.

1078878993481 is a deficient number, since it is larger than the sum of its proper divisors (1038692).

1078878993481 is an frugal number, since it uses more digits than its factorization.

1078878993481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2077382 (or 1038691 counting only the distinct ones).

The product of its (nonzero) digits is 195084288, while the sum is 73.

The spelling of 1078878993481 in words is "one trillion, seventy-eight billion, eight hundred seventy-eight million, nine hundred ninety-three thousand, four hundred eighty-one".