12920263554609 has 24 divisors (see below), whose sum is σ = 18737800877952. Its totient is φ = 8578823775840.

The previous prime is 12920263554607. The next prime is 12920263554617. The reversal of 12920263554609 is 90645536202921.

12920263554609 is a `hidden beast` number, since 1 + 2 + 9 + 2 + 0 + 26 + 3 + 5 + 5 + 4 + 609 = 666.

It is not a de Polignac number, because 12920263554609 - 2¹ = 12920263554607 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12920263554607) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6332839 + ... + 8120675.

It is an arithmetic number, because the mean of its divisors is an integer number (780741703248).

Almost surely, 2^{12920263554609} is an apocalyptic number.

It is an amenable number.

12920263554609 is a deficient number, since it is larger than the sum of its proper divisors (5817537323343).

12920263554609 is a wasteful number, since it uses less digits than its factorization.

12920263554609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1791077 (or 1791074 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 54.

The spelling of 12920263554609 in words is "twelve trillion, nine hundred twenty billion, two hundred sixty-three million, five hundred fifty-four thousand, six hundred nine".