1279533319920 has 160 divisors (see below), whose sum is σ = 4407729315840. Its totient is φ = 341174211840.

The previous prime is 1279533319907. The next prime is 1279533319969. The reversal of 1279533319920 is 299133359721.

1279533319920 is a `hidden beast` number, since 1 + 2 + 7 + 9 + 533 + 3 + 19 + 92 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26740657 + ... + 26788463.

It is an arithmetic number, because the mean of its divisors is an integer number (27548308224).

Almost surely, 2^{1279533319920} is an apocalyptic number.

1279533319920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1279533319920 is an abundant number, since it is smaller than the sum of its proper divisors (3128195995920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1279533319920 is a wasteful number, since it uses less digits than its factorization.

1279533319920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60220 (or 60208 counting only the distinct ones).

The product of its (nonzero) digits is 2755620, while the sum is 54.

The spelling of 1279533319920 in words is "one trillion, two hundred seventy-nine billion, five hundred thirty-three million, three hundred nineteen thousand, nine hundred twenty".