1056278721589 has 16 divisors (see below), whose sum is σ = 1302704881408. Its totient is φ = 834020883072.

The previous prime is 1056278721583. The next prime is 1056278721593. The reversal of 1056278721589 is 9851278726501.

It is not a de Polignac number, because 1056278721589 - 2³³ = 1047688786997 is a prime.

It is a super-2 number, since 2×1056278721589² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056278721583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11872992 + ... + 11961625.

It is an arithmetic number, because the mean of its divisors is an integer number (81419055088).

Almost surely, 2^{1056278721589} is an apocalyptic number.

It is an amenable number.

1056278721589 is a deficient number, since it is larger than the sum of its proper divisors (246426159819).

1056278721589 is a wasteful number, since it uses less digits than its factorization.

1056278721589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23835124.

The product of its (nonzero) digits is 16934400, while the sum is 61.

The spelling of 1056278721589 in words is "one trillion, fifty-six billion, two hundred seventy-eight million, seven hundred twenty-one thousand, five hundred eighty-nine".