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12997450878 = 2317196706631
BaseRepresentation
bin11000001101011010…
…10101110001111110
31020112210222220201120
430012231111301332
5203104321412003
65545420251410
7640042336536
oct140655256176
936483886646
1012997450878
11556a7a4245
1226289a0b66
1312c19bb649
148b42a44c6
155110eb853
hex306b55c7e

12997450878 has 32 divisors (see below), whose sum is σ = 28972650240. Its totient is φ = 3863018880.

The previous prime is 12997450867. The next prime is 12997450913. The reversal of 12997450878 is 87805479921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3351378 + ... + 3355253.

It is an arithmetic number, because the mean of its divisors is an integer number (905395320).

Almost surely, 212997450878 is an apocalyptic number.

12997450878 is an abundant number, since it is smaller than the sum of its proper divisors (15975199362).

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

12997450878 is a wasteful number, since it uses less digits than its factorization.

12997450878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6706672.

The product of its (nonzero) digits is 10160640, while the sum is 60.

The spelling of 12997450878 in words is "twelve billion, nine hundred ninety-seven million, four hundred fifty thousand, eight hundred seventy-eight".

Divisors: 1 2 3 6 17 19 34 38 51 57 102 114 323 646 969 1938 6706631 13413262 20119893 40239786 114012727 127425989 228025454 254851978 342038181 382277967 684076362 764555934 2166241813 4332483626 6498725439 12997450878