1279746473128 has 16 divisors (see below), whose sum is σ = 2401445812500. Its totient is φ = 639360923136.

The previous prime is 1279746473107. The next prime is 1279746473149. The reversal of 1279746473128 is 8213746479721.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1279746473107) and next prime (1279746473149).

It can be written as a sum of positive squares in 2 ways, for example, as 1277935289764 + 1811183364 = 1130458^2 + 42558^2 .

It is a super-2 number, since 2×1279746473128² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64028563 + ... + 64048546.

Almost surely, 2^{1279746473128} is an apocalyptic number.

It is an amenable number.

1279746473128 is a deficient number, since it is larger than the sum of its proper divisors (1121699339372).

1279746473128 is a wasteful number, since it uses less digits than its factorization.

1279746473128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128078364 (or 128078360 counting only the distinct ones).

The product of its digits is 28449792, while the sum is 61.

The spelling of 1279746473128 in words is "one trillion, two hundred seventy-nine billion, seven hundred forty-six million, four hundred seventy-three thousand, one hundred twenty-eight".