12920779554 has 16 divisors (see below), whose sum is σ = 25985927520. Its totient is φ = 4282865120.

The previous prime is 12920779519. The next prime is 12920779577. The reversal of 12920779554 is 45597702921.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12920779497 and 12920779506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6014187 + ... + 6016334.

It is an arithmetic number, because the mean of its divisors is an integer number (1624120470).

Almost surely, 2^12920779554 is an apocalyptic number.

12920779554 is an abundant number, since it is smaller than the sum of its proper divisors (13065147966).

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

12920779554 is a wasteful number, since it uses less digits than its factorization.

12920779554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12030705.

The product of its (nonzero) digits is 1587600, while the sum is 51.

The spelling of 12920779554 in words is "twelve billion, nine hundred twenty million, seven hundred seventy-nine thousand, five hundred fifty-four".