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12680808621 = 3131396193779
BaseRepresentation
bin10111100111101010…
…11100100010101101
31012201202011211012120
423303311130202231
5201432241333441
65454145423153
7626146044345
oct136365344255
935652154176
1012680808621
115417a93228
12255a93aab9
131271214870
148841dbd25
154e3401966
hex2f3d5c8ad

12680808621 has 32 divisors (see below), whose sum is σ = 18373824000. Its totient is φ = 7732870848.

The previous prime is 12680808617. The next prime is 12680808629.

12680808621 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12680808621 - 22 = 12680808617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12680808629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3353710 + ... + 3357488.

It is an arithmetic number, because the mean of its divisors is an integer number (574182000).

Almost surely, 212680808621 is an apocalyptic number.

It is an amenable number.

12680808621 is a deficient number, since it is larger than the sum of its proper divisors (5693015379).

12680808621 is a wasteful number, since it uses less digits than its factorization.

12680808621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4553.

The product of its (nonzero) digits is 73728, while the sum is 42.

The spelling of 12680808621 in words is "twelve billion, six hundred eighty million, eight hundred eight thousand, six hundred twenty-one".

Divisors: 1 3 13 39 139 417 619 1807 1857 3779 5421 8047 11337 24141 49127 86041 147381 258123 525281 1118533 1575843 2339201 3355599 6828653 7017603 20485959 30409613 91228839 325148939 975446817 4226936207 12680808621