1078861423969 has 10 divisors (see below), whose sum is σ = 1258596774370. Its totient is φ = 924738361344.

The previous prime is 1078861423897. The next prime is 1078861423987. The reversal of 1078861423969 is 9693241688701.

It can be written as a sum of positive squares in only one way, i.e., 956562241600 + 122299182369 = 978040^2 + 349713^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1078861423969 is a prime.

It is a super-2 number, since 2×1078861423969² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1078861423969.

It is not an unprimeable number, because it can be changed into a prime (1078861423999) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 224666784 + ... + 224671585.

It is an arithmetic number, because the mean of its divisors is an integer number (125859677437).

Almost surely, 2^{1078861423969} is an apocalyptic number.

It is an amenable number.

1078861423969 is a deficient number, since it is larger than the sum of its proper divisors (179735350401).

1078861423969 is an frugal number, since it uses more digits than its factorization.

1078861423969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449338397 (or 449338376 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 64.

The spelling of 1078861423969 in words is "one trillion, seventy-eight billion, eight hundred sixty-one million, four hundred twenty-three thousand, nine hundred sixty-nine".